42 Mo

Molybdenum

Transition metal
Atomic number42
CategoryTransition metal
Atomic mass95.95
Electron configuration[Kr]4d⁵ 5s¹
Oxidation states+4, +6
Electronegativity2.16
Melting point2,623 °C
Boiling point4,639 °C
Density10.28 g/cm³
Crystal structureBody-centred cubic
Group6
Period5
Blockd
Discovered1,781
Crustal abundance1.2 ppm

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