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CAS Number7440-53-1
PubChem CID23981
Атомен радиус180
Моларен обем20,8
Атомна маса151,964
Блокf
Температура на кипене1 529
Bulk Modulus
КатегорияЛантаниди
Кристална структураЦентрове центрирани кубични
ЦвятСребърен
Ковалентен радиус198
Плътност5,243
Electrical Resistivity
Електронна конфигурация[Xe] 4f7 6s2
Електрон на обвивка2, 8, 18, 25, 8, 2
Електроотрицателност1,2
Electrons63
Групаna
Топлина на сливането9,2
Топлина на изпаряване175
Йонизационен потенциал5,67
Magnetic Ordering
Magnetic Susceptibility
Маса151,964
Mass Number63
Температура на топене826
ИмеЕвропий
Неутрони89
Атомен номер152
Оксидационни държави2, 3
Период6
ФазаТвърди
Poisson Ratio
Протони63
Shear Modulus
Специфичен топлинен капацитет0,182
СимволEu
Топлопроводимост0,139
Van der Waals radius
Young's Modulus
Изобилие
Изобилие в земната кора0.00018%
Изобилие в вселената5×10-8%
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 гръцката дума Buraq, персийски Burah 63 1901 Eugene Demarcay France Named after "Europe"

Isotopes of Boron

Standard Atomic Weight

151.964(1)

Стабилни изотопи

151Eu 153Eu

Нестабилни изотопи

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.