Molybdenum (Mo) — Element 42

42 Mo 95.95

Molybdenum

Element 42 · 95.95 u · d-block

transition metal

A high-melting-point metal essential in steel alloys. Also a trace element needed by living organisms.

Phase (STP)

Solid

Melting Point

2623 °C

Boiling Point

4639 °C

Density

10.22 g/cm³

Electronegativity

2.16

Atomic Radius

145 pm

Ionization Energy

684 kJ/mol

Electron Affinity

72 kJ/mol

Discovered

1781 · Carl Wilhelm Scheele

Electron Configuration

[Kr] 4d5 5s1