Properties

CAS Number7440-42-8
PubChem CID5462311
Atomradius90
Atomic Volume4,6
Atommasse10,811
Blokp
Kogepunkt3.927
Bulk Modulus
KategoriHalvmetaller
KrystalstrukturSimpel Trigonal
FarveSort
Kovalent radius84
Massefylde2,34
Electrical Resistivity
Elektronkonfiguration[He] 2s2 2p1
Elektroner i hver skal2, 3
Elektronegativitet2,04
Electrons5
Gruppe13
Smeltevarme50
Fordampningsvarme507
Ionization Potential8,298
Magnetic Ordering
Magnetic Susceptibility
Masse10,811
Mass Number5
Smeltepunkt2.076
NavnBor
Neutrons6
Atomnummer11
Oxidationstrin1, 2, 3
Periode2
TilstandsformFast stof
Poisson Ratio
Protons5
Shear Modulus
Varmefylde1,026
SymbolB
Varmeledningsevne0,274
Van der Waals radius
Young's Modulus
Forekomst
Abundance in Earth's crust0.00086%
Abundance in Universe1×10-7%
B Bor 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"

Isotopes of Lawrencium

Standard Atomic Weight

[10.806,10.821]

Stable Isotopes

10B 11B

Unstable Isotopes

6B 7B 8B 9B 12B 13B 14B 15B 16B 17B 18B 19B

Lawrencium is harmful due to its radioactivity
Lawrencium is a trivalent ion in aqueous solution
Lawrencium is used for scientific research purposes only.