Lawrencium - ASCII Periodic Table of the Elements

ASCII PERIODIC TABLE OF THE ELEMENTS

  Lr

Relative atomic mass: [262]

English: Lawrencium
French: Lawrencium
Croatian: Lawrencij
German: Lawrencium
Italian: Lawrentio
Spanish: Lawrencio

Atomic number: 103
Group numbers: 3
Period: 7
Standard state (20 °C): solid

Discovery: 1961 Albert Ghiorso, Torbjørn Sikkeland, Almon E. Larsh, R.M. Latimer (US)

Lawrencium was discovered by Albert Ghiorso, Torbjorn Sikkeland, Almon E. Larsh, and Robert M. Latimer (US) in 1961. Named in honour of Ernest O. 'Lawrence', inventor of the cyclotron. It is a synthetic radioactive metal. Lawrencium was produced by bombarding a mixture of three isotopes of californium with boron-10 and boron-11 ions. Eight isotopes of lawrencium have been synthesized to date, with the longest-lived being lawrencium-256, which has a half-life of about 30 seconds.

Electronic configuration: [Rn] 5f¹⁴ 6d¹ 7s²
Formal oxidation number: +3
Atomic radius: - pm

Electronegativities: -
Thermal conductivity: - W/(m K)
Electrical resistivity (20 °C): - μΩcm

Melting point: - °C
Boiling point: - °C

Heat of fusion: - kJ/mol
Heat of vaporization: - kJ/mol
Heat of atomization: 308 kJ/mol