Periodic Table of Elements showing Potassium alkali metal elements


Atomic Number19
Molar Mass39.1 gmol-1
Electron Configuration[Ar]4s1
Normal Statesolid metal
Density @STP0.86 g cm-3
Melting Point63oC
Boiling Point759oC
Stable Isotopes39K, 40K, 41K
Atomic Radius235 pm
Ionic Radius138 (1+) pm
Electronegativity (Pauling)0.82
Ionization Energy (1st)419 kJ mol-1
Ionization Energy (2nd)3051 kJ mol-1
Ionization Energy (3rd)4411 kJ mol-1
Molar Heat Capacity29.6 J K-1mol-1
Standard Molar Entropy64.7 J K-1mol-1
Enthalpy of Fusion2.4 kJ mol-1
Enthalpy of Vapourization77.53 kJ mol-1
[Back to Periodic table]

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