Özellikler

CAS Number7440-53-1
PubChem CID23981
Atom yarıçapı180
Atomik Hacim20,8
Atom ağırlığı151,964
Blokf
Kaynama noktası1.529
Bulk Modulus
KategoriLantanit
Kristal yapısıHacim merkezli kübik
RenkGümüşi
Kovalent yarıçapı198
Yoğunluk5,243
Electrical Resistivity
Elektron dizilimi[Xe] 4f7 6s2
Enerji seviyesi başına Elektronlar2, 8, 18, 25, 8, 2
Elektronegatifliği1,2
Electrons63
Grupna
Ergime ısısı9,2
Buharlaşma ısısı175
İyonlaşma enerjisi5,67
Magnetic Ordering
Magnetic Susceptibility
Kütle151,964
Mass Number63
Ergime noktası826
İsimEuropyum
Nötronlar89
Atom numarası152
Yükseltgenme seviyeleri2, 3
Periyot6
FazKatı
Poisson Ratio
Protonlar63
Shear Modulus
Isı kapasitesi0,182
SembolEu
Isıl iletkenlik0,139
Van der Waals radius
Young's Modulus
Bulunabilirlik
Dünya kabuğundaki bulunulabilirliği0.00018%
Evrendeki bulunulabilirliği5×10-8%
Eu Europyum 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"

Bor izotopları

Standard Atomic Weight

151.964(1)

Kararlı izotoplar

151Eu 153Eu

Kararsız izotoplar

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.