24Solid
Cr 51.996 Atomic mass · uTransition metals
Chromium
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.
Discovery Ancient (Louis Nicolas Vauquelin)
K2L8M13N1
Physical properties
Values for the element in its standard state.
- Density
- 7.14g/cm³
- Melting point
- 2,180K
- Boiling point
- 2,944K
- Atomic radius
- 127pm
- Bonding type
- Metallic
- Molar heat
- 23.35J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 5 electrons; 4s, 1 electrons;
[Ar] represents 18 core electrons. The full view shows them explicitly.
24 electrons Orbital order preserved from source
- Electronegativity
- 1.66Pauling scale
- First ionization energy
- 653kJ/mol
- Electron affinity
- 64kJ/mol
- Van der Waals radius
- Not available
Cr ChromiumAtomic number 24
653kJ/mol
Atomic numberGaps indicate unavailable data
About chromium
- Appearance
- Silvery metallic
- Discovery
- Ancient (Louis Nicolas Vauquelin)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.