24 Cr 51.996
Chromium
transition metal
Properties
- Atomic number
- 24
- Atomic mass
- 51.996 u
- Category
- transition metal
- Group
- 6
- Period
- 4
- Block
- d-block
- State (room temp)
- Solid
- Outer-shell electrons
- 1
- Electronegativity
- 1.66 (Pauling)
- Density
- 7.19 g/cm³
- Melting point
- 1906.85 °C
- Boiling point
- 2670.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵
Noble-gas shorthand: [Ar] 3d⁵ 4s¹
Electrons per shell: 2, 8, 13, 1 — that's 1 in the outermost shell.
About 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.
- Discovered by Louis Nicolas Vauquelin
- Appearance: silvery metallic
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.