Proprietà

CAS Number7440-53-1
PubChem CID23981
Raggio Atomico180
Volume Molare20,8
Massa Atomica151,964
Bloccof
Punto di Ebollizione1.529
Bulk Modulus
CategoriaLantanidi
Struttura CristallinaCorpo Cubico Centrato
ColoreArgento
Raggio Covalente198
Densità5,243
Electrical Resistivity
Configurazione Elettronica[Xe] 4f7 6s2
Elettroni per shell2, 8, 18, 25, 8, 2
Elettronegatività1,2
Electrons63
Gruppona
Calore di Fusione9,2
Calore di Evaporazione175
Potenziale di Ionizzazione5,67
Magnetic Ordering
Magnetic Susceptibility
Massa151,964
Mass Number63
Punto di Fusione826
NomeEuropio
Neutroni89
Numero Atomico152
Stato di Ossidazione2, 3
Periodo6
FaseSolido
Poisson Ratio
Protoni63
Shear Modulus
Capacità Termica Specifica0,182
SimboloEu
Conduttività Termica0,139
Van der Waals radius
Young's Modulus
Abbondanza
Abbondanza sulla crosta terrestre0.00018%
Abbondanza nell'universo5×10-8%
Eu Europio 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. Dalla parola araba Buraq, in persiano Burah 63 1901 Eugene Demarcay France Named after "Europe"

Isotopi del boro

Standard Atomic Weight

151.964(1)

Isotopi Stabili

151Eu 153Eu

Isotopi Instabili

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.