Iodide salts are used in pharmaceuticals and disinfectants, printing inks and dyes, catalysts, animal feed supplements and photographic chemicals. His contemporary, Pierre Dulong, was less fortunate, losing an eye and part of a hand while studying the material, the first in a long list of casualties from this nasty material. Silver iodide [AgI] MENU: Periodic table Solubility Table Game News About на русском. © 2021 Diary Store. Its melting point is … Today, iodine has many commercial uses. The Periodic Table - the Halogens This page introduces the Halogens in Group 7 of the Periodic Table. for 1+3, enter 4. 5 Solubility product constant (K sp ) (or the solubility product) is the product of the molar concentrations of the constituent ions, each raised to the power of its stoichiometric coefficient in the equilibrium equation. Iodine on the periodic table? The radioactive isotope iodine-131 is sometimes used to treat cancerous thyroid glands. Download our free Periodic Table app for mobile phones and tablets. It is defined as being the charge that an atom would have if all bonds were ionic. Group Iodine can be found naturally in air, water and soil. Periodic Table: The periodic table of elements is where you can find all the known elements. Color: lustrous metallic gray, violet as a gas. The temperature at which the solid–liquid phase change occurs. The number of protons in an atom. The periodic table game available on this page is for entertainment purposes only, and should not be used to grade students on their knowledge of chemical elements. 2. The temperature at which the solid–liquid phase change occurs. Reasons To Choose Canada As Your Study Destination. Electron affinityThe energy released when an electron is added to the neutral atom and a negative ion is formed. We hope that you enjoy your visit to this Site. The others are radioactive with half-lives too short to be primordial. It exists as a lustrous purple-black non-metal that is solid under standard conditions of temperature and pressure. Iodine, he went on was essential for the proper development of the thyroid gland in the neck, and that if one didn't eat the right kind of salt, especially as a child, one might develop goitre and one's mental development would also be affected. Contact us today for more information home » Products » L-Z » Potassium iodide The availability of suitable substitutes for a given commodity. For © 2015 Kazuki Akamine. The percentage of an element produced in the top producing country. There are non radioactive and radioactive forms of iodine.Iodine is used as a disinfectant for cleaning surfaces and storage containers and is used in skin soaps and bandages, and for purifying water. This gland helps to regulate growth and body temperature. The percentage of a commodity which is recycled. Bond enthalpy (kJ mol−1)A measure of how much energy is needed to break all of the bonds of the same type in one mole of gaseous molecules. Block Use the periodic table on the Data Sheet to help you to answer these questions. The periodic table is an arrangement of the elements in order of atomic number. First ionisation energyThe minimum energy required to remove an electron from a neutral atom in its ground state. Sources . It is defined as the equilibrium pressure exerted by the gas produced above a substance in a closed system. I'm Chris Smith, thank you for listening and goodbye. Where more than one isotope exists, the value given is the abundance weighted average. Tin(II) iodide, also known as stannous iodide, is an ionic tin salt of iodine with the formula SnI 2.It has a formula weight of 372.519 g/mol. Photography was the first commercial use for iodine after Louis Daguerre, in 1839, invented a technique for producing images on a piece of metal. The arrangements of electrons above the last (closed shell) noble gas. It was seen as a source of energy and brightness, it was included in toothpastes and patent medicines - it was even rubbed into the scalp as a hair restorer. The toxic qualities of iodine were soon realized, and the tincture, a yellowish brown solution began to be widely used as a disinfectant. 4 likes. Some elements exist in several different structural forms, called allotropes. In U.S, the recommended daily dose of iodine is 110 to 113µg for infants to 12 months, 90 µg for 1 to 18 years old, 220µg for pregnant women and 290µg for lactation. SOLUBILITY: ammonia liquid [NH 3 ]: 531 (0°) water [H 2 O]: 0,0000003 (20°) sulfur dioxide [SO 2 ]: 0,016 (0°) methanol [CH 3 OH]: 0,0000001923 (25°) pyridine [C 5 H 5 N]: 0,1 (10°), 8,6 (121°) ethanol [C 2 H 5 OH]: 0,0000000062 (25°) The sample photograph includes text exactly as it appears in the poster, which you are encouraged to buy a copy of. It  is necessary in making certain printing-inks and dyes. ... Iodide is the ion state of iodine, occurring when iodine bonds with another element, such as potassium. Fluorine, Chlorine, Bromine, Astatine and Tennessine are the same group elements. This one is about iodine, the pretty purple element, which is part of one of the professor's favorite chemical equations. The atomic number of iodine is 53 in the periodic table. Chemistry in its element is brought to you by the Royal Society of Chemistry and produced by. The energy released when an electron is added to the neutral atom and a negative ion is formed. Periodic Table O Level. It is given by the ratio of the pressure on a body to the fractional decrease in volume. Galen for example recommended treatment with marine sponges. Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Aluminium, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Gallium, Germanium, Arsenic, Selenium, Bromine, Krypton, Indium, Tin, Antimony, Tellurium, Xenon, Thallium, Lead, Bismuth, Polonium, Astatine, Radon, Nihonium, Flerovium, Moscovium, Livermorium, Tennessine and Oganesson are the same block elements. Members of a group typically have similar properties and electron configurations in their outer shell. Elements are organised into blocks by the orbital type in which the outer electrons are found. Melting point Why did he look so sad? Iodine compounds are useful as catalysts in certain chemical reactions. The origin of the name comes from the Greek word iodes meaning violet.It is a shiny, black, non-metallic solid with characteristic odour. 2019 International Year Of The Periodic Table. Apparatus (per group) - One student worksheet - One clear plastic sheet (eg ohp sheet). The percentage of the world reserves located in the country with the largest reserves. It is essential in the synthesis of thyroid hormones. In the past iodine was obtained from seaweed. A deficiency of iodine can cause the thyroid gland to swell up (known as goitre). We welcome your feedback. Group 7 is also known by its more modern name of Group 17. Or you can see both side-by-side with bigger pictures in numerical order . Naming anions is slightly different than naming cations. Ghosts that clearly live on amongst the British aristocracy. The images may not be posted on any website, shared in any disc library, image storage mechanism, network system or similar arrangement. The mass of an atom relative to that of carbon-12. (a) €€€€Draw a ring around the correct answer to complete the sentence. See the famous Iodine Clock reaction filmed with a high-speed camera. Period But the application of radium that would bring it notoriety was its use in glow-in-the-dark paint. A horizontal row in the periodic table. Data for this section been provided by the British Geological Survey. The periodic table achieved its modern form through the work of the German chemist Julius Lothar Meyer (1830–1895) and the Russian chemist Dimitri Mendeleev (1834–1907), both of whom focused on the relationships between Hydrogen, Helium, LithiumBeryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine,  Neon , Sodium, Magnesium, Aluminium, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Gallium, Germanium, Arsenic, Selenium, Bromine, Krypton,  Rubidium, Strontium, Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium, Rhodium, Palladium, Silver, Cadmium, Indium, Tin, Antimony, Tellurium, Iodine, Xenon,  Caesium, Barium, Lanthanum,  Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Hafnium, Tantalum, Tungsten, Rhenium, Osmium, Iridium, Platinum, Gold, Mercury, Thallium, Lead, Bismuth, Polonium, Astatine, Radon,  Francium, Radium, Actinium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium, Lawrencium, Rutherfordium, Dubnium, Seaborgium, Bohrium, Hassium, Meitnerium, Darmstadtium, Roentgenium, Copernicium, Nihonium, Flerovium, Moscovium, Livermorium, Tennessine, Oganesson. Tagged under Acid, Crystal, Symbol, Magenta, Periodic Table. Medium = substitution is possible but there may be an economic and/or performance impact Elemental iodine occurs as I2 – two molecules bonded Frequently used to provide luminous readouts on clocks and watches, aircraft switches and instrument dials, the eerie blue glow of radium was seen as a harmless, practical source of night time illumination. A horizontal row in the periodic table. Get periodic table facts on the chemical and physical properties of the element iodine. Electron configuration: [Kr] 4d10 5s2 5p5. Common Properties Abundance in Earth's Crust It is used in production of animal feed supplements. These values were determined using several different methods. Visualize trends, 3D orbitals, isotopes, and mix compounds. When I returned to Cogne last summer, I tried to remember where the institute had been. If you are in any doubt, please ask. The transition of a substance directly from the solid to the gas phase without passing through a liquid phase. Density is the mass of a substance that would fill 1 cm3 at room temperature. Iodine is also used to make polarising filters for LCD displays. Now the main sources of iodine are iodate minerals, natural brine deposits left by the evaporation of ancient seas and brackish (briny) waters from oil and salt wells. The name is derived from the Greek 'iodes' meaning violet. The halogens (/ˈhælədʒən, ˈheɪ-, -loʊ-, -ˌdʒɛn/) are a group in the periodic table consisting of five chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). High = substitution not possible or very difficult. The numbers are staggering; the Napoleonic census of the canton of Valais in 1800 found 4000 cretins in a population of 70,000 - well over 50% would have had goiter. Where are the halogens on the periodic table? € groups. Hello, this week cretins, fire crackers and clean water. Iodine and Iodide. Iodine was discovered by Bernard Courtois (FR) in 1811. But what these mysterious minerals might be was a mystery. Wartime shortages of wood forced them instead to burn seaweed, which was plentiful on the coastlines of northern France. Low = substitution is possible with little or no economic and/or performance impact. Density (g cm−3) It exists as a lustrous purple-black non-metal that is solid under standard conditions of temperature and pressure. Pornographic, defamatory, libellous, scandalous, fraudulent, immoral, infringing or otherwise unlawful use of the Images is, of course, prohibited. What was wrong with him? Periodic Table secondary school. Iodine is also used to make polarising filters for LCD displays. The Periodic Table helps to categorise the known elements and make predictions about ones that we haven’t yet discovered. Iodine is a halogen that locates in group 17 of the periodic table of elements.. The role of the element in humans, animals and plants. You may not further copy, alter, distribute or otherwise use any of the materials from this Site without the advance, written consent of the RSC. In 1811 a young French chemist, Bernard Courtois, working in Paris stumbled across a new element. These images were called daguerreotypes. A measure of how difficult it is to deform a material. Text © The Royal Society of Chemistry 1999-2011 Figure \(\PageIndex{1}\): Periodic table showing electronegativity values of elements. A measure of how difficult it is to compress a substance. The atomic number of each element increases by one, reading from left to right. About 400.000 tonnes of iodine escape from the oceans every year as iodide in sea spray or as iodide, hydrichloric acid and methyl iodide, produced by marine organisms. Iodine is a naturally occurring element found in sea water and in certain rocks and sediments. Ca(NH 3) + 2NH 4 I → CaI 2 + 2NH 3 + H 2 (g) Many species of seaweed contain iodine. Specific heat capacity is the amount of energy needed to change the temperature of a kilogram of a substance by 1 K. A measure of the stiffness of a substance. Murray Robertson is the artist behind the images which make up Visual Elements. Iodine Material Sign Drawing K27746813 Fotosearch. Some elements exist in several different structural forms, called allotropes. The disease had been known to medical writers for centuries. Crossword Answers for "It follows iodine in the periodic table" Added … It was surrounded by a tall metal fence and had an institutional look about it. Nor shall the RSC be in any event liable for any damage to your computer equipment or software which may occur on account of your access to or use of the Site, or your downloading of materials, data, text, software, or images from the Site, whether caused by a virus, bug or otherwise. € rows. 1100x1059. This one is about iodine, the pretty purple element, which is part of one of the professor's favorite chemical equations. Periodic Table of Videos Created by video journalist Brady Haran working with chemists at The University of Nottingham. This is approximately the sum of the number of protons and neutrons in the nucleus. CAS number Iodine is the chemical element and it is represented by the symbol I and its atomic number is 53. Sublimation It is given by the ratio of the shear stress to the shear strain. One afternoon, when I was around 10 years old, returning with my Dad from a long hike, we passed a dull grey building on the edge of the village. One way to make potassium iodide is to react the hydroxide with hydroiodic acid. Iodine, iodide, and potassium iodide are all different forms of the chemical element iodine. When heated, iodine sublimes to form a purple vapour. Members of a group typically have similar properties and electron configurations in their outer shell. Courtois continued to play with the element and was rather shocked to discover that when mixed with ammonia it produced a chocolate-coloured solid that exploded violently at the least provocation. The number of atoms of the element per 1 million atoms of the Earth’s crust. Next week we're shining the spotlight on a substance that needs no illuminating at all and that's because it makes its own light. High = substitution not possible or very difficult. It was only when a number of the workers who painted the luminous dials began to suffer from sores, anaemia and cancers around the mouth that it was realized that something was horribly wrong. The availability of suitable substitutes for a given commodity. This is because their atoms have the same number of electrons in the highest occupied energy level. Atoms of the same element with different numbers of neutrons. Each allotrope has different physical properties. I would later read of English travellers passing through the Alps referring to The Valleys of the Cretins - travel books of the period often include lurid illustrations of these poor unfortunates. This is going to be quite a … Interactive periodic table showing names, electrons, and oxidation states. 053.1 at The Wooden Periodic Table Table by Theodore Gray My periodic table poster is now available! Iodine Properties Health Effects Iodine Uses Periodic Table. It is only present in trace amounts (0.05 parts per million); however, it is assimilated by seaweeds. To find more Lithium iodide information like chemical properties, structure, melting point, boiling point, density, molecular formula, molecular weight, physical properties and toxicity information. Atoms of the same element with different numbers of neutrons. He organized the elements by atomic number, which is equal to the number of protons found in the nucleus of the element’s atoms. ... Chlorine is more reactive than the iodine in potassium iodide solution: At room temperature, the iodine is in a solid state. Its chemical symbol is I and its atomic number is 53 on the Periodic Table of Elements. For more information on the Visual Elements image see the Uses and properties section below. The RSC maintains this Site for your information, education, communication, and personal entertainment. Astonished by this discovery he bottled up the crystals and sent them to one of the foremost chemists of his day Joseph Gay-Lussac who confirmed that this was a new element and named it iode - iodine - after the greek word for purple. Nearly all elements in the periodic table form binary iodides. In such cases we would ask you to sign a Visual Elements licence agreement, tailored to the specific use you propose. Below you will find the correct answer to It follows iodine in the periodic table Crossword Clue, if you need more help finishing your crossword continue your navigation and try our search function. Atomic number Small pure smaples of calcum iodide may be made through the reaction of calcium metal in liquid ammonia with ammonium iodide. Relative atomic mass It retains the other specific information like its melting point and other similar information. E.g. In the periodic table it is a p-block element and it is a member of the 17th period and is placed in group 5. Use the periodic table on the Data Sheet to help you to answer these questions. In the modern IUPAC nomenclature, this group is known as group 17. The ground state electronic configuration of neutral iodine is [Kr].4d 10.5s 2.5p 5 and the term symbol of iodine is 2 P 3/2.. Iodine: description Your user agent does not support the HTML5 Audio element. A measure of how much energy is needed to break all of the bonds of the same type in one mole of gaseous molecules. I pestered my father with questions. It provides a measure of how difficult it is to extend a material, with a value given by the ratio of tensile strength to tensile strain. Isotopes Cation vs anion periodic table It can be possible to predict whether an atom will form a cation or an anion based on its position on the periodic table. Click here to buy a book, photographic periodic table poster, card deck, or 3D print based on the images you see here! A higher recycling rate may reduce risk to supply. Commercial use of the Images will be charged at a rate based on the particular use, prices on application. Normally we get enough iodine from the food we eat. The halogens (/ˈhælədʒən, ˈheɪ-, -loʊ-, -ˌdʒɛn/[1][2][3]) are a group in the periodic table consisting of five chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). The mass of an atom relative to that of carbon-12. The team at periodicvideos has created a TED-Ed Lesson for every element of the periodic table. It is present in many rare earth element but mostly it is extracted from the mineral bastnasite, monazite, cerite, gadolinite and samarskite. The RSC makes no representations whatsoever about the suitability of the information contained in the documents and related graphics published on this Site for any purpose. (a) €€€€Draw a ring around the correct answer to complete the sentence. To do this they used wood ash. The periodic table is designed to be interactive, to allow information to be well presented and easy to access, on any device. In no event shall the RSC be liable for any damages including, without limitation, indirect or consequential damages, or any damages whatsoever arising from use or loss of use, data or profits, whether in action of contract, negligence or other tortious action, arising out of or in connection with the use of the material available from this Site. It is mostly found in seawater, as iodide. Rubidium, Strontium, Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium, Rhodium, Palladium, Silver, Cadmium, Indium, Tin, Antimony, Tellurium and Xenon are the elements in the same period. That was UCL chemist Andrea Sella telling the tale of iodine, element number 53. In U.S, the recommended daily dose of iodine is 110 to 113µg for infants to 12 months, 90 µg for 1 to 18 years old, 220µg for pregnant women and 290µg for lactation. 383.78 KB. Sodium Iodide Iodide Periodic Table Acid Periodic Acid Crystal Iodine Chemical Element Chemistry Alkali Metal Symbol Chemical Substance Potassium Sodium Molecule Purple Sphere Magenta Violet. Chemicals (per group) handout. Medium = substitution is possible but there may be an economic and/or performance impact, Low = substitution is possible with little or no economic and/or performance impact, If you wish to use the Images in a manner not permitted by these terms and conditions please contact the Publishing Services Department. Iodine with the symbol ‘I’ is a dark gray or purple blackish nonmetallic element with atomic number 53 in the Periodic Table. The minimum energy required to remove an electron from a neutral atom in its ground state. The oxidation state of an atom is a measure of the degree of oxidation of an atom. 4 True or false? Iodised edible salt is an essential additive in culinary preparations. Elements are organised into blocks by the orbital type in which the outer electrons are found. All rights reserved. A vertical column in the periodic table. Half of the distance between two atoms within a single covalent bond. Iodine has an atomic number, number 53, on the Periodic Table of Elements. But to me, Cogne will always be connected with the element iodine. This WebElements periodic table page contains compound data [rubidium (I) iodide] for the element rubidium ... Potassium iodide is used in photography and radiation pills. If you wish to use the Images in a manner not permitted by these terms and conditions please contact the Publishing Services Department by email. Electron configuration Half of the distance between two unbonded atoms of the same element when the electrostatic forces are balanced. Uncombined elements have an oxidation state of 0. Most of the earth's iodine can be found in the oceans. It is one of the rarer earth elements necessary for life. The temperature at which the liquid–gas phase change occurs. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. The resulting salt can then be purified by recrystallization. Paracelsus, the great renaissance healer, alchemist, and writer was one of the first to spot the connexion between goiter and cretinism, and first suggested that minerals in drinking water might play a role in causing the condition. Iodine is an essential element for humans, who need a daily intake of about 0.1 milligrams of iodide. Iodine I. The higher the value, the larger risk there is to supply. The chemical symbol for Iodine is I. Today, iodine has many commercial uses. Other binary iodides. The higher the value, the larger risk there is to supply. What is the charge of an electron? The temperature at which the liquid–gas phase change occurs. The group of halogens is the only periodic table group that contains elements in all three main states of matter at standard temperature and pressure. Where more than one isotope exists, the value given is the abundance weighted average. Iodine is the chemical element and it is represented by the symbol I and its atomic number is 53. His family's firm produced the saltpetre needed to make gunpowder for Napoleon's wars. In the periodic table it is a p-block element and it is a member of the 17th period and is placed in group 5. Boiling point It is one of the rarer earth elements necessary for life. The list below is intended as a guide to the more important quantities which might be encountered in teaching and used in question papers. What have you learnt already? Free Download Transparent PNG Sodium Iodide Periodic Table Periodic Acid, Aqueous PNG. It is number 53 on the periodic table. Source: Walgreens Pharmacy This Site has been carefully prepared for your visit, and we ask you to honour and agree to the following terms and conditions when using this Site. These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f). Deficiency of iodine can lead to serious. Covalent radiusHalf of the distance between two atoms within a single covalent bond. Iodide salts are used in many pharmaceuticals. To most Italians the name is associated with a sensational murder. Adding concentrated sulphuric acid to the ash, Courtois, obtained an astonishing purple vapour that crystallized onto the sides of the container. Iodine Periodic Table Online Shopping For Women Men Kids Fashion. Density is the mass of a substance that would fill 1 cm. It was only two years after its discovery, that a doctor in Geneva Francois Coindet began to wonder whether it wasn't the iodine in the seaweed that was the missing mineral responsible for goiter. Download our free Periodic Table app for mobile phones and tablets. You can know detailed information for each element. You can see photographs of all the samples displayed in a periodic table format: my pictures or their pictures. An integrated supply risk index from 1 (very low risk) to 10 (very high risk). Samarium is mostly present in China, Brazil, India, Srilanka and Australia. Acid - Sodium Iodide Periodic Table - Crystal - Aqueous Free PNG is a 1100x1059 PNG image with a transparent background. Images © Murray Robertson 1999-2011 The story starts in Italy, and here's Andrea Sella. The RSC has been granted the sole and exclusive right and licence to produce, publish and further license the Images. It exists as a lustrous purple-black non-metal that is solid under standard conditions of … To find out more information about an element, simply click on it to get a full screen view, with a variety of different information, including electron configuration, general information such as boiling or melting point, and information for engineers. Solubility product constant (K sp ) (or the solubility product) is the product of the molar concentrations of the constituent ions, each raised to the power of its stoichiometric coefficient in the equilibrium equation. Others know that in winter the valley has some of the finest ice-climbing in the Alps. In the periodic table the columns are known as periods. Welcome to "A Visual Interpretation of The Table of Elements", the most striking version of the periodic table on the web. Developed by Codezene. Half of the distance between two unbonded atoms of the same element when the electrostatic forces are balanced. A black, shiny, crystalline solid. Iodine is an important ingredient in photographic chemicals. A vertical column in the periodic table. The picture on the left was taken by me. The artificially created element 117, tennessine (Ts), may also be a halogen. Iodine is found in seawater, as iodide. Samarium is as abundant as tin in the Earth crust. 3. Our bodies contain up to 20 milligrams, mainly in the thyroid gland. Anhydrous hydrogen iodide is a poor solvent, able to dissolve only small molecular compounds such as nitrosyl chloride and phenol, or salts with very low lattice energies such as tetraalkylammonium halides. Chlorine is the most reactive halogen The This question is for testing whether or not you are a human visitor and to prevent automated spam submissions. Where are the alkali metals on the periodic table? You may browse, download or print out one copy of the material displayed on the Site for your personal, non-commercial, non-public use, but you must retain all copyright and other proprietary notices contained on the materials. The team at periodicvideos has created a TED-Ed Lesson for every element of the periodic table. To find more Sodium iodide information like chemical properties, structure, melting point, boiling point, density, molecular formula, molecular weight, physical properties and toxicity information. Periodic Table of Elements. It is mainly found on Earth as the water-soluble iodide in brine pools and oceans. It is about 8 parts per million, and 40thmost abundant element in the Earth crust. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure.The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Elements in the same group in the periodic table have similar chemical properties. The atomic number of each element increases by one, reading from left to right. Allotropes It isnature The periodic table of the elements was first introduced in the mid-19th century by Dmitry Mendeleev. A measure of the propensity of a substance to evaporate. Our bodies contain up to 20 milligrams, mainly in the thyroid gland. Iodine is a solid which turns to a purple vapour when heated. The tendency of an atom to attract electrons towards itself, expressed on a relative scale. Solve this simple math problem and enter the result. You do not have JavaScript enabled. In the periodic table the columns are known as periods. Fully descriptive writeups. Elemental iodine falls within the halogen group on the periodic table of elements. Iodine atoms have 53 electrons and the shell structure is 2.8.18.18.7.