24
Cr
chromium
51.996

General properties

Group
group 6
Period
period 4
Category
transition metals
Standard atomic weight
51.9961(6)
Melting point
2180 K (1907 °C)
Boiling point
2944 K (2671 °C)
Phase at STP
solid

Additional properties

Block
d-block
Electron configuration
[Ar] 3d⁵ 4s¹
Electrons per shell
2, 8, 13, 1
Electronegativity
1.66
Density
7.19 g/cm³
Oxidation states
−4, −2, −1, 0, +1, +2, +3, +4, +5, +6
CAS Number
7440-47-3