Periodic Table of Elements showing actinide elements





Astatine

ElementAstatine
SymbolAt
Atomic Number85
Molar Mass210 gmol-1
Electron Configuration[Xe]4f145d106s26p5
Normal Statesolid nonmetal
Density @STPg cm-3
Melting Point302oC
Boiling Point337oC
Stable Isotopesnone
Atomic Radiuspm
Ionic Radius227 (1-) pm
Electronegativity (Pauling)2
Ionization Energy (1st)930 kJ mol-1
Ionization Energy (2nd)1600 kJ mol-1
Ionization Energy (3rd)2900 kJ mol-1
Molar Heat CapacityJ K-1mol-1
Standard Molar EntropyJ K-1mol-1
Enthalpy of Fusion23.8 kJ mol-1
Enthalpy of Vapourization100.8 kJ mol-1
[Back to Periodic table]



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