Discovered By: Marie Curie
Discovery year: 1898

The following table showing some properties of Polonium(Po):

Table Example
Atomic number 84
Group 16
Period 6
Block p
Electrons 84
Protons 84
Neutrons 125
Atomic weight (209)
Oxidation states +2, +4
Ionic charge Po^2+, Po^4+


Table Example
Electrons per shell K2 L8 M18 N32 O18 P6
Electon configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^14 5d^10 6p^4
Atomic radius 135 pm
Covalen radius 140 pm
Boiling point 962°C
Melting point 254°C
Phase Solid
Fusion heat 13 kJ.mol^-1
Vaporization heat 100 kJ.mol^-1
Color Silver


Table Example
Density 9196 kg.m^-3
Molar volume 2.27*10^-5 m^3.mol^-1
Electrical conductivity 2.3*10^6 S.m^-1
Electrical type Conductor
Resistivity 4.3*10^-7 Ohm.m
Electronegativity 2
Valence 6
Electron affinity 183.3 kJ.mol^-1
First ionization energy 812.1 kJ.mol^-1
Radioactive Yes


Table Example
Half life 3.22*10^9 s
Lifetime 4.64*10^9
Neutron cross section 0.5 barn
Decay mode Alpha emission(α-decay)