Egenskaper

CAS Number7440-42-8
PubChem CID5462311
Atomradie90
Molvolym4,6
Atommassa10,811
Blockp
Kokpunkt3 927
Bulk Modulus
KategoriMetalloid
KristallstrukturEnkelt trigonal
FärgSvart
Kovalent radie84
Densitet2,34
Electrical Resistivity
Elektronkonfiguration[He] 2s2 2p1
Elektroner per skal2, 3
Elektronegativitet2,04
Electrons5
Grupp13
Smältvärme50
Ångbildningsvärme507
Jonisationspotential8,298
Magnetic Ordering
Magnetic Susceptibility
Massa10,811
Mass Number5
Smältpunkt2 076
NamnBor
Neutroner6
Atomnummer11
Oxidationstillstånd1, 2, 3
Period2
AggregationstillståndFast
Poisson Ratio
Protoner5
Shear Modulus
Specifik värmekapacitet1,026
TeckenB
Värmeledningsförmåga0,274
Van der Waals radius
Young's Modulus
Förekomst
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"

Lawrenciumisotoper

Standard Atomic Weight

[10.806,10.821]

Stabila isotoper

10B 11B

Instabila isotoper

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.