Svojstva

CAS broj7440-53-1
PubChem CID23981
Atomski radijus180
Atomski volumen20,8
Relativna atomska masa151,964
Blokf
Vrelište1.529
Modul stišljivosti
KategorijaLantanoidi
Kristalna strukturaKubna prostorno centrirana
BojaSrebrna
Kovalentni radijus198
Gustoća5,243
Električna otpornost
Elektronska konfiguracija[Xe] 4f7 6s2
Elektrona po ljusci2, 8, 18, 25, 8, 2
Elektronegativnost1,2
Elektroni63
Skupinana
Toplina taljenja9,2
Toplina isparavanja175
Potencijal ionizacije5,67
Magnetsko redanje
Magnetska osjetljivost
Masa151,964
Maseni broj63
Talište826
NazivEuropij
Neutroni89
Atomski broj152
Stanja oksidacije2, 3
Perioda6
Agregacijsko stanjeČvrsto
Poissonov omjer
Protoni63
Modul smicanja
Specifični toplinski kapacitet0,182
SimbolEu
Toplinska vodljivost0,139
Van der Waalsov radijus
Youngov modul
Obilnost
Zastupljenost u Zemljinoj kori0.00018%
Zastupljenost u svemiru5×10-8%
Eu Europij 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
Spojevi bora poznati su već tisućama godina, ali element su otkrili Sir Humphry Davy, Gay-Lussac i Thendard tek 1808.

Bor nije bio prepoznat kao element dok ga 1808. Sir Humphry Davy, Joseph Louis Gay-Lussac i Louis Jacques Thénard nisu izolirali.

Jöns Jakob Berzelius je identificarao bor kao element 1824. Od arapske riječi buraq, perzijski burah 63 1901 Eugene Demarcay France Named after "Europe"

Isotopes of Boron

Standard Atomic Weight

151.964(1)

Stabilni izotopi

151Eu 153Eu

Nestabilni izotopi

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.