Proprietăți

CAS Number7440-42-8
PubChem CID5462311
Rază atomică90
Volum molar4,6
Masă atomică10,811
Blocp
Punct de fierbere3.927
Bulk Modulus
CategorieMetaloid
Structură cristalinăSimplu Trigonal
CuloareNegru
Rază de covalență84
Densitate2,34
Electrical Resistivity
Configurație electronică[He] 2s2 2p1
Electroni pe nivelul de energie2, 3
Electronegativitate2,04
Electrons5
Grupă13
Energie de fuziune50
Energie de evaporare507
Potențial de ionizare8,298
Magnetic Ordering
Magnetic Susceptibility
Masa10,811
Mass Number5
Punct de topire2.076
NumeBor
Neutroni6
Număr atomic11
Număr de oxidare1, 2, 3
Perioadă2
FazăSolid
Poisson Ratio
Protoni5
Shear Modulus
Căldură specifică1,026
SimbolB
Conductivitate termică0,274
Van der Waals radius
Young's Modulus
Abundență naturală
Abundența în scoarța Pământului0.00086%
Abundența în Univers1×10-7%
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. Numit după Ernest O. Lawrence, inventator al ciclotronului 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]

Izotopi stabili

10B 11B

Izotopi instabili

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.