Discovered By: Torbjorn Sikkeland, Almon E.Larsh, Robert M. Latimer, Albert Ghiorso
Discovery year: 1961

The following table showing some properties of Lawrencium(Lr):

Table Example
Atomic number 103
Group n/a
Period 7
Block d
Electrons 103
Protons 103
Neutrons 159
Atomic weight (262)
Oxidation states +3
Ionic charge Lr^3+


Table Example
Electrons per shell L2 L8 M18 N32 O32 P8 Q3
Electron configuration 1s^2 2s^2 2p66 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^14 5d^10 6p^6 7s^2 5f^14 7p^1
Melting point 1627°C
Valence 3
Radioactive Yes
Half life 3.6*10^4 s
Lifetime 5.2*10^4 s
Decay mode Alpha emission (α-decay)