Chromium

Chromium (from chroma – colour) is a chemical element in the periodic system of the elements with the symbol Cr and the ordinal number 24. The compounds of chrome have a lot of different colours and are often used as pigments in colours and lacquers.

Element category: transition metal
Group, period, block: 6, 4, d
Standard atomic weight: 51.9961(6) g·mol−1
Electron configuration: [Ar] 3d5 4s1
Electrons per shell: 2, 8, 13, 1

Melting point 2180 K, 1907 °C, 3465 °F
Boiling point 2944 K, 2671 °C, 4840 °F