Discovered By: Glenn Seaborg, Ralph Arthur James, Albert Ghiorso
Discovery year: 1944

The following table showing some properties of Curium(Cm):

Table Example
Atomic number 96
Group n/a
Period 7
Block f
Atomic weight (247)
Oxidation states +3, +4
Ionic charge Cm^3+
Electrons 96
Protons 96
Neutrons 151


Table Example
Electrons per shell K2 L8 M18 N32 O25 P9 Q2
Electron 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 5d610 6p^6 7s^2 5f^7 6d^1
Covalent radius 169 pm
Boiling point 3110°C
Melting point 1345°C
Phase Solid
Color Silver
Density 13510 kg.m^-3
Molar volume 1.83*10^-5 m^3.mol^-1
Electronegativity 1.3


Table Example
Valence 4
First ionization energy 581 kJ.mol^-1
Radioactive Yes
Half life 4.92*10^14 s
Lifetime 7.1*10^14 s
Neutron cross section 60 barn
Decay mode Alpha emission (α-decay)