Molybdenum

Transition metals · Group 6 · Period 5

Atomic properties

Atomic number	42
Symbol	Mo
Standard atomic weight	95.95
Classification	Transition metals
Group	6
Period	5
Block	d-block
Electron configuration	[Kr] 4d5 5s1
Electronegativity (Pauling)	2.16
Common oxidation states	+6, +4

Physical properties

Phase at 20 °C	Solid
Density	10.28 g/cm³
Melting point	2623 °C
Boiling point	4639 °C
Discovered	1778
CAS number	—

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