Својства

CAS Number7440-53-1
PubChem CID23981
Атомски радијус180
Молска запремина20,8
Атомска маса151,964
Блокf
Температура кључања1.529
Bulk Modulus
КатегоријаЛантаноиди
Кристална структураПросторноцентрична Кубична
БојаСребрена
Ковалентни радијус198
Густина5,243
Electrical Resistivity
Електронска конфигурација[Xe] 4f7 6s2
Електрони по љусци2, 8, 18, 25, 8, 2
Електронегативност1,2
Electrons63
Групаna
Топлота топљења9,2
Топлота испаравања175
Јонизујући потенцијал5,67
Magnetic Ordering
Magnetic Susceptibility
Маса151,964
Mass Number63
Температура топљења826
НазивЕуропијум
Неутрони89
Атомски број152
Оксидациона стања2, 3
Периода6
СтањеЧвсрто
Poisson Ratio
Протони63
Shear Modulus
Специфична топлота0,182
СимболEu
Топлотна проводљивост0,139
Van der Waals radius
Young's Modulus
Заступљеност
Заступљеност у Земљиној кори0.00018%
Заступљеност у Космосу5×10-8%
Eu Еуропијум 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. From the Arabic word Buraq, Persian 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.