#CHROMIUM ATOMIC NUMBER SKIN#

(iv) Always remember that if you write down electronic configuration of ion (cation or anion), than first you write configuration of basic atom than add or remove the electron from the system otherwise always there is a chance of error. (iii) Unless otherwise mentioned, electronic configuration always means the electronic configuration in the ground state. (ii) Although the orbitals of lower energy are filled first but the electronic configuration are written not in the order in which the orbitals were filled but in the order of principal quantum numbers. Such a symbol stands for the electronic configuration of that inert gas and is usually called the core of the inert gas. are used as the first part of the configuration. (i) To avoid the writing of electronic configurations in a lengthy way, usually the symbols 2, 10, 18 etc. While writing the electronic configurations, the following points may also be noted: Some important points in writing electronic configurations. more in d 5 than in d 4 and more in d 10 than in d 9), therefore exchange energy is maximum and hence the stability is maximum. As the number of exchanges that can take place is maximum in the exactly half-filled and completely filled arrangements (i.e. Each such exchange leads to a greater stability which can be explained in terms of exchange energy. The electrons present in the different orbitals of the same subshell can exchange their positions. The half-filled and completely filled configurations are more symmetrical and symmetry leads to greater stability. The greater stability of these configurations is due to the following two reasons : The reason for the tendency of the subshells to be completely filled or exactly half-filled is that it leads to greater stability.Ĭause of greater stability of exactly half-filled and completely filled configurations. However in case of palladium, two electrons are involved (the only case with a difference. Thus generally only one electron jumps from lower energy orbital to higher energy orbital e.g.

The cost of pure chromium is $0.32 per gram, and in bulk, it costs $0.0028 per gram. It turns into green oxide (Cr 2O 3) when heated.Human foods that are rich in chromium include wheat gram, kidney, and brewer’s yeast.The element is graphically represented to indicate its mirror-like shine and toxic nature.

#CHROMIUM ATOMIC NUMBER SKIN#

Accidental or occupational exposure to chromium compounds (especially hexavalent chromium compounds) can cause irritation and obstruction of the airways, nasal, lung, or sinus cancer, skin allergies, renal tubular damage, liver abnormalities, and cardiovascular collapse. Īlthough chromium is found in trace amounts in the human body and it helps us in utilizing glucose, it can be poisonous when inhaled or ingested in excess (more than 1 mg a day).

Its compounds are used for dyeing fabrics in the textile industries and anodizing aluminum by the aircraft industries.

Furnaces and kilns in industries are made with chromite ore since it can withstand high temperatures.

The red color of rubies comes from chromium while the emerald green color in glasses is also obtained by treating it with chromium.

Its compounds are valued as catalysts and pigments.

Animal skin is treated with chromium sulfate to turn it into hot water-resistant leather.

It is used for tanning 90 percent of all the leather in the world.

Chromium-plated bathroom fittings and automobile parts are commonly used for their corrosion resistance properties.

Electroplating a layer of chromium provides a polished mirror-like finish to steel.

Chromium is used for producing many metal alloys, including steel, thereby hardening and protecting them from rust.

State of matter at room temperature (solid/liquid/gas)Ĭhromium Electron Configuration (Bohr Model) What is Chromium Used for

He also found that the green color of emeralds was due to the presence of chromium. Since the new element could produce a wide range of colors in solution, he called it chromium after the Greek ‘chroma’. In 1798, he dissolved the mineral in hydrochloric acid to create a mixture, precipitated lead to filter it off, and then successfully isolating chromium from the remaining filtrate. Louis Nicolas Vauquelin, being captivated by the red mineral (Siberian red lead) found in a gold mine in Siberia in 1766, started experimenting with it to confirm that it was a mineral containing lead. Who discovered it: The French chemist and pharmacist Louis Nicolas Vauquelin is known for the discovery of chromium. Origin of its Name: The element is named after the Greek word ‘chroma’, which means “color”.

Chromium atomic number