Symbol
Lr
Atomic Number
103
Atomic Mass
262
Protons
103
Neutrons
159
Electrons
103
Type
Actinide
Isotopes
Lawrencium-262
Discovery Year
1961
Discovered By
Albert Ghiorso, Glenn T. Seaborg, and others
Group
3
Period
7
Boiling Point
Unknown
Melting Point
1627°C
Electron Configuration
[Rn] 7s² 5f¹³ 6d¹
Density (g/cm³)
15.37
Crystal Structure
Cubic
Magnetism
Paramagnetic
Abundance in Earth's Crust
Trace
Phase at Room Temperature
Solid