Eigenschaften

CAS-Nummer7440-53-1
PubChem CID23981
Atomradius180
Molares Volumen20,8
Atommasse151,964
Blockf
Siedepunkt1.529
Bulk Modulus
KategorieLanthanoide
KristallstrukturKubisch raumzentriert
FarbeSilber
Kovalenter Radius198
Dichte5,243
Electrical Resistivity
Elektronenkonfiguration[Xe] 4f7 6s2
Elektronen pro Schale2, 8, 18, 25, 8, 2
Elektronegativität1,2
Elektronen63
Gruppena
Schmelzwärme9,2
Verdampfungswärme175
Ionisierungsenergie5,67
Magnetic Ordering
Magnetic Susceptibility
Masse151,964
Massenzahl63
Schmelzpunkt826
NameEuropium
Neutronen89
Ordnungszahl152
Oxidationszustände2, 3
Periode6
AggregatzustandFest
Poisson Ratio
Protonen63
Shear Modulus
Spezifische Wärmekapazität0,182
ElementsymbolEu
Wärmeleitfähigkeit0,139
Van der Waals Radius
Young's Modulus
Häufigkeit
Häufigkeit in der Erdkruste0.00018%
Häufigkeit im Universum5×10-8%
Eu Europium 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. Aus dem Arabischen Buraq, Persisch Burah 63 1901 Eugene Demarcay France Named after "Europe"

Isotopes of Boron

Standard Atomic Weight

151.964(1)

Stabile Isotope

151Eu 153Eu

Instabile Isotope

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.