B ホウ素 5 10.811 13 2 p 5 2079.0 2550.0 [He] 2s2 2p1 2 3 2.34 0.00086% Black Rhombohedral 2.0 2.051 {"1":"800.6","2":"2427.1","3":"3659.7","4":"25025.8","5":"32826.7"} 801 26.7 82 3 0.98 4.6 22.6 507.8 1.026 27.0 0 Solid, Diamagnetic, Insulator, Stable, Natural, Metalloid BO-ron Hard, brittle, lustrous black semimetal. Exists in the earth's crust at an average proportion of about 10 parts per million. Used with titanium & tungsten to make heat resistant alloys for jets & rockets. Obtained from kernite, a kind of borax (Na2B4O7.10H2O). High purity boron is produced by electrolysis of molten potassium fluroborate and potassium chloride (KCl). JzqdHkpXuy4 Boron

Lawrencium was discovered by Albert Ghiorso, Torbjørn Sikkeland, Almon Larsh and Robert M. Latimer in 1961 at the University of California, Berkeley.

It was produced by the bombardment of californium with boron atoms.

Lawrencium was the last member of the actinide series to be discovered. Named after Ernest O. Lawrence, inventor of the cyclotron 5 1808 Sir Humphry Davy, Joseph Louis Gay-Lussac, and Louis Jacques Thénard England, France From the Arabic word "buraq" and the Persian word "burah"

Lawrencium is harmful due to its radioactivity

Lawrencium is a trivalent ion in aqueous solution

Lawrencium is used for scientific research purposes only.