Beryllium vs Molybdenum

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PropertyBe BerylliumMo Molybdenum
Atomic number442
SymbolBeMo
NameBerylliumMolybdenum
Categoryalkaline-earth-metaltransition-metal
Standard Atomic Weight9.012183 u95.95 u
Period25
Group26
Blockss
Phase at STPsolidsolid
Electron configuration[He]2s2[Kr]5s14d5
Oxidation states[0, 1, 2][-4, -2, -1, 0, 1, 2, 3, 4, 5, 6]
Electronegativity (Pauling)1.572.16
Electron affinity-0.52 eV0.744 eV
Density1850 kg/m³1.020000e+4 kg/m³
Melting point1286.85 °C2622.85 °C
Boiling point2470.85 °C4638.85 °C
Discovery year17971778