42
Mo
Molybdenum
Molybdenum
Molybdenum (Mo)
Transition Metals · Solid · Period 5 · Group 6
Element Properties
- Atomic Number
- 42
- Symbol
- Mo
- Atomic Mass
- 95.95
- Category
- Transition Metals
- Standard State
- Solid
- Period
- 5
- Group
- 6
- Electronegativity
- 2.16
- Atomic Radius
- 209
- Ionization Energy
- 7.09
- Electron Affinity
- 0.75
- Oxidation States
- +6
- Melting Point
- 2896 K (2622.85 °C)
- Boiling Point
- 4912 K (4638.85 °C)
- Density
- 10.2
- Electron Configuration
- [Kr]5s1 4d5
- Year Discovered
- 1778
Electron shells
[Kr]5s1 4d5
Electrons are arranged in shells (principal energy levels) around the nucleus. The diagram is a schematic — orbitals in the same shell are not drawn separately.
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Frequently asked questions
What is the atomic number of Molybdenum?
The atomic number of Molybdenum is 42, which equals the number of protons in its nucleus.
What is the atomic mass of Molybdenum?
The atomic mass of Molybdenum is approximately 95.95 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Molybdenum?
The electron configuration of Molybdenum is [Kr]5s1 4d5.
Where is Molybdenum in the periodic table?
Molybdenum is located in period 5, group 6.
When was Molybdenum discovered?
Molybdenum was discovered in 1778.