42 Mo 95.951
Molybdenum
transition metal
Properties
- Atomic number
- 42
- Atomic mass
- 95.951 u
- Category
- transition metal
- Group
- 6
- Period
- 5
- Block
- d-block
- State (room temp)
- Solid
- Outer-shell electrons
- 1
- Electronegativity
- 2.16 (Pauling)
- Density
- 10.28 g/cm³
- Melting point
- 2622.85 °C
- Boiling point
- 4638.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d⁵
Noble-gas shorthand: [Kr] 4d⁵ 5s¹
Electrons per shell: 2, 8, 18, 13, 1 — that's 1 in the outermost shell.
About Molybdenum
Molybdenum is a chemical element with symbol Mo and atomic number 42. The name is from Neo-Latin molybdaenum, from Ancient Greek Μόλυβδος molybdos, meaning lead, since its ores were confused with lead ores. Molybdenum minerals have been known throughout history, but the element was discovered (in the sense of differentiating it as a new entity from the mineral salts of other metals) in 1778 by Carl Wilhelm Scheele.
- Discovered by Carl Wilhelm Scheele
- Appearance: gray metallic
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.