24 Cr
Transition metal
Chromium
Gives stainless steel its shine.
Properties of Chromium
- Atomic number (Z)
- 24
- Symbol
- Cr
- Atomic mass
- 51.996 g/mol
- Category
- Transition metal
- Group
- 6
- Period
- 4
- Electron configuration
- [Ar] 3d⁵ 4s¹
- Electronegativity (Pauling)
- 1.66
- Atomic radius
- 166 pm
- First ionization energy
- 653 kJ/mol
- Melting point
- 2180 K (1906.8 °C)
- Boiling point
- 2944 K (2670.8 °C)
- Density
- 7.15 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1797