Name Lawrencium
Symbol Lr
Atomic Number 103
Atomic Mass 262.0 atomic mass units
Number of Protons 103
Number of Neutrons 159
Number of Electrons 103
Melting Point Unknown
Boiling Point Unknown
Density Unknown
Normal Phase Synthetic
Family Rare Earth Metals
Period 6
Cost Unavailable



Origin of Name After Ernest Orlando Lawrence, physicist and inventor of the cyclotron
Date and Place of Discovery On February 14, 1961 at the Berkeley Radiation Laboratory (known called Lawrence Berkeley National Laboartory) at the University of California at Berkeley
Discovered by Albert Ghiorso, Torbjørn Sikkeland, Almon Larsh and Robert M. Latimer
Common Compounds
Interesting facts
  • If enough of it could be produced, it would be a radiation hazard.
  • Very little is known about this element, except they think it behaves similarly to other actinides.
Common Uses There are no known uses outside of laboratory research.


Photo Courtesy of Chem Society
Chemical Elements
Web Elements

Lawrencium Atomic Structure Elements by Name Elements by Number