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Chromium (Cr)
Atomic number: 24 · Category: transition metal · Group 6 · Period 4 · Phase: Solid
Chromium is a chemical element with 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.
Atomic mass: 51.99616
Density: 7.19
Melting point: 2180 K
Boiling point: 2944 K
Appearance: silvery metallic
Source: Wikipedia
Block: d
Molar heat: 23.35
CPK color:#8a99c7
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s1 3d5
Configuration (semantic): [Ar] 3d5 4s1
Shells: 2, 8, 13, 1
Electronegativity (Pauling): 1.66
Electron affinity: 65.21
Ionization energies: 652.9, 1590.6, 2987, 4743, 6702, 8744.9, 15455, 17820, 20190, 23580, 26130, 28750, 34230, 37066, 97510, 105800, 114300, 125300, 134700, 144300, 157700, 166090, 721870, 761733
Periodic position
Group: 6
Period: 4
xpos: 6
ypos: 4
Spectral/Bohr images
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3D Model