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Molybdenum (Mo)
Atomic number 42 · transition
| Atomic number | 42 |
|---|---|
| Atomic mass | 95.95 u |
| Molar mass | 95.95 g/mol |
| Category | transition |
| Group / period / block | 6 / 5 / d |
| Electron configuration | [Kr] 4d5 5s |
| Electrons per shell | 2, 8, 18, 13, 1 |
| Electronegativity (Pauling) | 2.16 |
| Atomic radius | 145.0 pm |
| Density | 10.2 g/cm³ |
| First ionisation energy | 7.0924 eV |
| Melting point | 2895.15 K (2622.00 °C) |
| Boiling point | 4912.15 K (4639.00 °C) |
| Common oxidation states | +4, +6 |
| Abundance in Earth's crust | 1.2 ppm |
Uses
High-strength steel, lubricants
Discovery
1778, Carl Wilhelm Scheele