Свойства

CAS Number7440-42-8
PubChem CID5462311
Атомен радиус90
Моларен обем4,6
Атомна маса10,811
Блокp
Температура на кипене3 927
Bulk Modulus
КатегорияМеталоид
Кристална структураОбикновен триъгълник
ЦвятЧерен
Ковалентен радиус84
Плътност2,34
Electrical Resistivity
Електронна конфигурация[He] 2s2 2p1
Електрон на обвивка2, 3
Електроотрицателност2,04
Electrons5
Група13
Топлина на сливането50
Топлина на изпаряване507
Йонизационен потенциал8,298
Magnetic Ordering
Magnetic Susceptibility
Маса10,811
Mass Number5
Температура на топене2 076
ИмеБор
Неутрони6
Атомен номер11
Оксидационни държави1, 2, 3
Период2
ФазаТвърди
Poisson Ratio
Протони5
Shear Modulus
Специфичен топлинен капацитет1,026
СимволB
Топлопроводимост0,274
Van der Waals radius
Young's Modulus
Изобилие
Изобилие в земната кора0.00086%
Изобилие в вселената1×10-7%
B Бор 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]

Стабилни изотопи

10B 11B

Нестабилни изотопи

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.