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, which is 1 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
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
Molybdenum: frequently asked questions
- What is Molybdenum?
- Molybdenum (Mo) is the chemical element with atomic number 42. It is a metal: specifically a transition metal.
- What is the atomic number of Molybdenum?
- Molybdenum's atomic number is 42, which means every Molybdenum atom has 42 protons in its nucleus.
- What is the electron configuration of Molybdenum?
- The electron configuration of Molybdenum is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d5 (noble-gas shorthand: [Kr] 4d5 5s1). Its electrons are arranged in shells of 2, 8, 18, 13, 1, with 1 in the outermost shell.
- Is Molybdenum a metal or a nonmetal?
- Molybdenum is a metal: specifically a transition metal.
- What group and period is Molybdenum in?
- Molybdenum is in group 6 and period 5 of the periodic table.
- Is Molybdenum a solid, liquid, or gas?
- At room temperature, Molybdenum is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.