Molybdenum

Koushik 26/06/2026 19:58:08 Updated 26/06/2026 19:58:08

Property	Value
Atomic Number	42
Element	Molybdenum
Symbol	Mo
Atomic Mass	95.95 u
Number of Neutrons	54 (most common isotope, Molybdenum-98)
Number of Protons	42
Number of Electrons	42
Period	5
Group	6
Phase	Solid
Radioactive	No
Natural	Yes
Metal	Yes
Nonmetal	No
Metalloid	No
Type	Transition Metal
Atomic Radius	190 pm
Electronegativity	2.16 (Pauling scale)
First Ionization Energy	7.092 eV
Density	10.28 g/cm³
Melting Point	2623 °C
Boiling Point	4639 °C
Number of Isotopes	7 stable (Mo-92, Mo-94, Mo-95, Mo-96, Mo-97, Mo-98, Mo-100)
Discoverer	Carl Wilhelm Scheele
Year	1778
Specific Heat	0.251 J/g·K
Number of Shells	5
Number of Valence Electrons	6