Свойства

CAS Number7440-53-1
PubChem CID23981
Атомный радиус180
Атомный объем20,8
Атомный вес151,964
Блокf
Температура кипения1 529
Bulk Modulus
КатегорияЛантаноиды
Кристаллическая структураТелоцентрированный куб
ЦветСеребряный
Ковалентный радиус198
Плотность5,243
Electrical Resistivity
Электронная конфигурация[Xe] 4f7 6s2
Электронов на оболочку2, 8, 18, 25, 8, 2
Электроотрицательность1,2
Electrons63
Группаna
Теплота плавления9,2
Теплота парообразования175
Ионизационный потенциал5,67
Magnetic Ordering
Magnetic Susceptibility
Масса151,964
Mass Number63
Температура плавления826
ИмяЕвропий
Нейтроны89
Атомный номер152
Состояния окисления2, 3
Период6
ФазаТвердое тело
Poisson Ratio
Протоны63
Shear Modulus
Удельная теплоемкость0,182
СимволEu
Теплопроводность0,139
Van der Waals radius
Young's Modulus
Избыток
Избыток на Земле0.00018%
Избыток во Вселенной5×10-8%
Eu Европий 63 151.964 6 f 63 822.0 1529.0 [Xe] 4f7 6s2 2 8 18 25 8 2 5.24 0.00018% Silver Cubic: Body centered {"1":"547.1","2":"1085","3":"2404","4":"4120"} 547 50 +3,2 1.99 28.9 9.21 175.73 0.182 13.9 90.5K 0 Solid, Paramagnetic, Conductor, Lanthanide, Stable, Natural yoo-RO-pi-em Soft, silvery-white metal. Used with yttrium oxide to make red phosphors for color televisions. Obtained from monazite sand, which is a mixture of phosphates of calcium, thorium, cerium, and most other rare earths. 88YOmg_FUVo Europium
Boron compounds have been known for thousands of years, but the element was not discovered until 1808 by Sir Humphry Davy and by Gay-Lussac and Thenard.

Boron was not recognized as an element until it was isolated in 1808 by Sir Humphry Davy and by Joseph Louis Gay-Lussac and Louis Jacques Thénard.

Jöns Jakob Berzelius identified boron as an element in 1824. От арабского слова Бурак, персидского Бура 63 1901 Eugene Demarcay France Named after "Europe"

Изотопы бора

Standard Atomic Weight

151.964(1)

Стабильные изотопы

151Eu 153Eu

Нестабильные изотопы

130Eu 131Eu 132Eu 133Eu 134Eu 135Eu 136Eu 137Eu 138Eu 139Eu 140Eu 141Eu 142Eu 143Eu 144Eu 145Eu 146Eu 147Eu 148Eu 149Eu 150Eu 152Eu 154Eu 155Eu 156Eu 157Eu 158Eu 159Eu 160Eu 161Eu 162Eu 163Eu 164Eu 165Eu 166Eu 167Eu

Elemental boron, boron oxide, boric acid, borates and many organoboron compounds are non-toxic
Boron is an essential nutrient for all green plants
Boron oxide is used in glassmaking and ceramics.

Borax is used in making fiberglass, as a cleansing fluid, a water softener, insecticide, herbicide and disinfectant.

Boric acid is used as a mild antiseptic and as a flame retardant.

Boron shielding is used as a control for nuclear reactors.