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, which is 1 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
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
Chromium: frequently asked questions
- What is Chromium?
- Chromium (Cr) is the chemical element with atomic number 24. It is a metal: specifically a transition metal.
- What is the atomic number of Chromium?
- Chromium's atomic number is 24, which means every Chromium atom has 24 protons in its nucleus.
- What is the electron configuration of Chromium?
- The electron configuration of Chromium is 1s2 2s2 2p6 3s2 3p6 4s1 3d5 (noble-gas shorthand: [Ar] 3d5 4s1). Its electrons are arranged in shells of 2, 8, 13, 1, with 1 in the outermost shell.
- Is Chromium a metal or a nonmetal?
- Chromium is a metal: specifically a transition metal.
- What group and period is Chromium in?
- Chromium is in group 6 and period 4 of the periodic table.
- Is Chromium a solid, liquid, or gas?
- At room temperature, Chromium is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.