Page 23 - Curriculum Visions Dynamic Book

Lawrencium (Lr)
Element 103.An artificial and radioactive element among the transition metals in the Periodic Table.
Discovery
It was produced in 1961 at Berkeley, California, by Albert Ghiorso,T. Sikkeland, A. E. Larsh, and R.M. Latimer by bombarding californium with boron ions accelerated in a heavy- ion linear accelerator.This produced short-lived isotopes of lawrencium.
Technology
Very little lawrencium (about 2 micrograms) has been produced, and so far no one has found any uses for it.
Geology
Lawrencium is not found naturally in the environment.
Biology
Lawrencium does not occur in living things; but because it is radioactive,
it could be harmful if produced in substantial quantities.
Key facts...
Name: lawrencium
Symbol: Lr
Atomic number: 103
Atomic weight: 260.1
Position in Periodic Table: transition metal,
group (3) (scandium group); period 7 State at room temperature: solid Colour: unknown
Density: n/a
Melting point: n/a
Boiling point: n/a
Origin of name: named after Ernest O. Lawrence,
the inventor of the cyclotron
Shell pattern of electrons: 2–8–18–32–32–9–2
23