Propriedades

CAS Number7440-53-1
PubChem CID23981
Raio atómico180
Volume atômico20,8
Massa atômica151,964
Blocof
Ponto de ebulição1.529
Bulk Modulus
CategoriaLantanóides
Estrutura cristalinaCúbico de corpo centrado
CorPrata
Raio covalente198
Densidade5,243
Electrical Resistivity
Configuração eletrônica[Xe] 4f7 6s2
Elétrons por nível2, 8, 18, 25, 8, 2
Eletronegatividade1,2
Electrons63
Grupona
Entalpia de fusão9,2
Entalpia de vaporização175
Potencial de ionização5,67
Magnetic Ordering
Magnetic Susceptibility
Massa151,964
Mass Number63
Ponto de fusão826
NomeEurópio
Nêutrons89
Número atómico152
Estados de oxidação2, 3
Período6
Estado da matériaSólido
Poisson Ratio
Prótons63
Shear Modulus
Calor específico0,182
SímboloEu
Condutividade térmica0,139
Van der Waals radius
Young's Modulus
Abundância
Abundância na Crosta Terrestre0.00018%
Abundância no Universo5×10-8%
Eu Európio 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. Do árabe, Buraq (em persa: Burah) 63 1901 Eugene Demarcay France Named after "Europe"

Isotopes of Boron

Standard Atomic Weight

151.964(1)

Isótopos Estáveis

151Eu 153Eu

Isótopos Instáveis

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.