89

Lr

Lawrencium
[ 262 ]
 Historical Information

Element 103, lawrencium, was discovered in 1961 by Ghiorso and others in Berkeley, California, USA, who bombarded a californium target with boron ions. They obtained perhaps two micrograms. Several lawrencium isotopes including those with masses 253, 254, 255, 256, 257, 258, 259, and 260 are known now.
Basic Information Shells
  • Name:Lawrencium
  • Symbol: Lr
  • Atomic number: 103
  • Atomic weight: [ 262 ]
  • Standard state: solid at 298 K
  • Group in periodic table: 3
  • Group name:actinoids
  • Period in periodic table: 7
  • Block in periodic table: d-block
  • Classification: Metallic
 Lawrencium
Uses Trivia
  • It has no uses.

Lawrencium is a synthetic "rare earth metal" which does not occur in the environment.