Proprietà

CAS Number7440-42-8
PubChem CID5462311
Raggio Atomico90
Volume Molare4,6
Massa Atomica10,811
Bloccop
Punto di Ebollizione3.927
Bulk Modulus
CategoriaSemimetalli
Struttura CristallinaTrigonale Semplice
ColoreNero
Raggio Covalente84
Densità2,34
Electrical Resistivity
Configurazione Elettronica[He] 2s2 2p1
Elettroni per shell2, 3
Elettronegatività2,04
Electrons5
Gruppo13
Calore di Fusione50
Calore di Evaporazione507
Potenziale di Ionizzazione8,298
Magnetic Ordering
Magnetic Susceptibility
Massa10,811
Mass Number5
Punto di Fusione2.076
NomeBoro
Neutroni6
Numero Atomico11
Stato di Ossidazione1, 2, 3
Periodo2
FaseSolido
Poisson Ratio
Protoni5
Shear Modulus
Capacità Termica Specifica1,026
SimboloB
Conduttività Termica0,274
Van der Waals radius
Young's Modulus
Abbondanza
Abbondanza sulla crosta terrestre0.00086%
Abbondanza nell'universo1×10-7%
B Boro 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. Prende il nome da Ernest O. Lawrence, inventore del Ciclotrone 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"

Isotopi del laurenzio

Standard Atomic Weight

[10.806,10.821]

Isotopi Stabili

10B 11B

Isotopi 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.