Svojstva

CAS broj7440-42-8
PubChem CID5462311
Atomski radijus90
Atomski volumen4,6
Relativna atomska masa10,811
Blokp
Vrelište3.927
Modul stišljivosti
KategorijaPolumetali
Kristalna strukturaJednostavna Trigonska
BojaCrna
Kovalentni radijus84
Gustoća2,34
Električna otpornost
Elektronska konfiguracija[He] 2s2 2p1
Elektrona po ljusci2, 3
Elektronegativnost2,04
Elektroni5
Skupina13
Toplina taljenja50
Toplina isparavanja507
Potencijal ionizacije8,298
Magnetsko redanje
Magnetska osjetljivost
Masa10,811
Maseni broj5
Talište2.076
NazivBor
Neutroni6
Atomski broj11
Stanja oksidacije1, 2, 3
Perioda2
Agregacijsko stanjeČvrsto
Poissonov omjer
Protoni5
Modul smicanja
Specifični toplinski kapacitet1,026
SimbolB
Toplinska vodljivost0,274
Van der Waalsov radijus
Youngov modul
Obilnost
Zastupljenost u Zemljinoj kori0.00086%
Zastupljenost u svemiru1×10-7%
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. Imenovan po Ernetsu O. Lawrencu, izumitelju ciklotrona 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]

Stabilni izotopi

10B 11B

Nestabilni izotopi

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.