Adding iodine to salt was done as a response to that regions soil levels being extremely low in iodine and people simply weren’t eating enough iodine rich foods.

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.

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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. Boiling point Iodine is a chemical element with symbol I and atomic number 53. Iodine is sometimes added to table salt to prevent thyroid disease. And you can hear the story of radium from Brian Clegg on next week's Chemistry in its element, I hope you can join us.
Thanks for the interesting comment Jessica – it may be worth considering whether we continue to show configurations using the principal quantum number convention or whether we show the actual configuration, when it’s known.

Although iodine is a non-metal, it displays some metallic properties.

Hi Jayden, thanks for your kind words. The tendency of an atom to attract electrons towards itself, expressed on a relative scale. A solution containing potassium iodide (KI) and iodine in alcohol is used to disinfect external wounds.

Half of the distance between two unbonded atoms of the same element when the electrostatic forces are balanced. Iodine’s other uses include catalysts, animal feeds and printing inks and dyes. Iodine is an essential element for humans, who need a daily intake of about 0.1 milligrams of iodide. This is approximately the sum of the number of protons and neutrons in the nucleus. Iodine crystals sublimate (turn from solid to gas without becoming liquid) and then freeze back to solid iodine.

OLD DOMINION UNIVERSITY. Chemical clock reactions – amazing color changes. The percentage of an element produced in the top producing country.

It is defined as the equilibrium pressure exerted by the gas produced above a substance in a closed system.

The percentage of a commodity which is recycled.

A percentile rank for the political stability of the top producing country, derived from World Bank governance indicators. High = substitution not possible or very difficult. Electron configuration

His family's firm produced the saltpetre needed to make gunpowder for Napoleon's wars. Welcome to "A Visual Interpretation of The Table of Elements", the most striking version of the periodic table on the web. Iodide and thyroxin, which contains iodine, are used inside the body. Block Isotopes

These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f).

6s 4f 5d 6p

This means that it doesn’t matter whether in a real atom the 5s has lower or higher energy than the 4d orbitals. It’s Elemental - The Periodic Table of Elements.

Later, Jean Lugol discovered that bonding iodine to a mineral (potassium) made it water soluble, and allowed for the later discovery of iodine's antiseptic qualities.
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. It was discovered by French chemist Bernard Courtois in 1811 whereby Gay-Lussac subsequently suggested the name "iode", from the Greek word ιώδες (iodes) for violet, because of the color of iodine vapor. Members of a group typically have similar properties and electron configurations in their outer shell. Medium = substitution is possible but there may be an economic and/or performance impact

ePORTFOLIO FOR 123-IODINE. It is given by the ratio of the shear stress to the shear strain.

Kelp, a type of seaweed, is a popular source of iodine, since it absorbs the element from seawater. Iodine’s purple vapor is shown below in a photo by Matias Molnar.

Source: In nature, iodine occurs in the form of iodide ions, mainly in seawater. Where more than one isotope exists, the value given is the abundance weighted average.

The Chemical Abstracts Service registry number is a unique identifier of a particular chemical, designed to prevent confusion arising from different languages and naming systems. Sitting on the bench all on his own was a strange looking old man - he had rather shaggy hair, a vacant look, and a large, distended pouch of skin where his neck should have been. Iodine was added to salt around 1924 by the Morton Salt Company at the request of government initiatives, due to the growing need for regulation of iodine deficiency disorders. Wartime shortages of wood forced them instead to burn seaweed, which was plentiful on the coastlines of northern France. Hello, this week cretins, fire crackers and clean water. Iodine’s name comes from the Greek work ‘iodes’ meaning violet.

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. The temperature at which the liquid–gas phase change occurs. 2s 2p A measure of how much energy is needed to break all of the bonds of the same type in one mole of gaseous molecules.

But what these mysterious minerals might be was a mystery.

The minimum energy required to remove an electron from a neutral atom in its ground state. A horizontal row in the periodic table.

Electronegativity (Pauling scale)The tendency of an atom to attract electrons towards itself, expressed on a relative scale. If you are in any doubt, please ask. The RSC maintains this Site for your information, education, communication, and personal entertainment.