Molybdenum (Mo) — Element 42: Properties & Data | Aladdin Scientific
Molybdenum(Mo) — Element 42
Molybdenum (Mo) is a transition metal with atomic number 42 and atomic mass 95.95. It has melting point 2896 K (2623 °C), boiling point 4912 K (4639 °C), density 10.2 g/cm³. It sits in group 6 and period 5 of the periodic table and was discovered in 1778.
Key facts
| Atomic mass | 95.9500 u |
|---|---|
| Electron configuration | [Kr]5s1 4d5 |
| Oxidation states | +6 |
| Electronegativity (Pauling) | 2.16 |
| Atomic radius (van der Waals) | 209 pm |
| Ionization energy | 7.092 eV |
| Electron affinity | 0.746 eV |
| Melting point | 2896 K |
| Boiling point | 4912 K |
| Density | 10.2 g/cm³ |
| Standard state | Solid |
| Year discovered | 1778 |
Frequently asked questions
What is the electron configuration of molybdenum?
The ground-state electron configuration of molybdenum is [Kr]5s1 4d5.
What group and period is molybdenum in?
Molybdenum (Mo) is in group 6 and period 5 of the periodic table, classified as a transition metal.
What is the melting point of molybdenum?
Molybdenum melts at 2896 K (2623 °C).
What is the standard state of molybdenum?
Molybdenum is a solid at standard temperature and pressure.
Related elements
About this data: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: .