|Group||6||Melting point||1907 °C|
|Period||4||Boiling point||2672 °C|
|Block||d||Density (g cm−3)||7.19 g.cm-3 at 20°C|
|Atomic number||24||Relative atomic mass||51.996|
|State at 20°C||Solid||Key isotopes||52Cr|
|Electron configuration||[Ar]3d5 4s1||CAS number||7440-47-3|
|ChemSpider ID||22407||ChemSpider is a free chemical structure database|
- Chromium is a chemical element with atomic number 24 and represented by the symbol Cr in the Periodic Table.
- Chromium is a lustrous, hard metal which has a silver-grey color. It has a high melting point.
- Trivalent chromium is a vital nutrient that is found in traces sugar, human insulin, and lipid metabolism.
- Electroplating: It is one of the important uses of chromium. Have you seen the shiny caps over the tires of a car? That shiny plating is made using chromium.
- Emeralds: A small amount of chromium is found in the crystal lattice structure of expensive gems like the emerald.
- New alloys: are formed using chromium. You might have seen chromium on the outside, but it is also mixed with metals to form alloys. Stainless steel and aluminum alloys use a small amount of chromium.
- Paints and Dyes: This useful element is also found in paint and dyes and chemical makeup that is used for fabrics.
- Chromium burns when heated and the compound that it forms is a green chromic oxide.
- Chromium protects the metal below by immediately producing a thin oxide layer that is impermeable to oxygen.
- One of the important characteristics of chromium is that it won’t get rusted easily, and thus this element is great for electroplating.
- Chromium was used by ancient Chinese.
- About eighty percent of chromium that is produced annually goes towards the production of metal alloy.