Rubidium vs Xenon

PropertyRb RubidiumXe Xenon
Atomic number3754
SymbolRbXe
NameRubidiumXenon
Categoryalkali-metalnoble-gas
Standard Atomic Weight85.4678 u131.293 u
Period55
Group118
Blocksp
Phase at STPsolidgas
Electron configuration[Kr]5s1[Kr]5s24d105p6
Oxidation states[-1, 1][0, 2, 4, 6, 8]
Electronegativity (Pauling)0.822.6
Electron affinity0.4859 eV-0.8 eV
Density1530 kg/m³5.887 kg/m³
Melting point39.31 °C-111.79 °C
Boiling point687.85 °C-108.1 °C
Discovery year18611898