Phosphorus vs Strontium

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PropertyP PhosphorusSr Strontium
Atomic number1538
SymbolPSr
NamePhosphorusStrontium
Categorynonmetalalkaline-earth-metal
Standard Atomic Weight30.973762 u87.62 u
Period35
Group152
Blockps
Phase at STPsolidsolid
Electron configuration[Ne]3s23p3[Kr]5s2
Oxidation states[-3, -2, -1, 0, 1, 2, 3, 4, 5][1, 2]
Electronegativity (Pauling)2.190.95
Electron affinity0.7466 eV0.052 eV
Density1820 kg/m³2640 kg/m³
Melting point44.15 °C776.85 °C
Boiling point280.5 °C1381.85 °C
Discovery year16691792