Chromium

Chromium is a chemical element which has the symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard and brittle metal which takes a high polish, resists tarnishing, and has a high melting point. The name of the element is derived from the Greek word "chrōma", meaning colour, because many of its compounds are intensely coloured.
Symbol: Cr
Atomic number: 24
Electron configuration: [Ar] 3d5 4s1
Melting point: 1,907 °C
Atomic mass: 51.9961 ± 0.0006 u
CAS ID: 7440-47-3