CAS Number7440-53-1
PubChem CID23981
Atomic Radius১৮০
Atomic Volume২০.৮
Atomic Weight১৫১.৯৬৪
Boiling Point১,৫২৯
Bulk Modulus
Crystal StructureBody Centered Cubic
Covalent Radius১৯৮
Electrical Resistivity
Electron Configuration[Xe] 4f7 6s2
Electrons per shell2, 8, 18, 25, 8, 2
Heat of Fusion৯.২
Heat of Vaporization১৭৫
Ionization Potential৫.৬৭
Magnetic Ordering
Magnetic Susceptibility
Mass Number63
Melting Point৮২৬
Atomic Number152
Oxidation States2, 3
Poisson Ratio
Shear Modulus
Specific Heat Capacity০.১৮২
Thermal Conductivity০.১৩৯
Van der Waals radius
Young's Modulus
Abundance in Earth's crust0.00018%
Abundance in Universe5×10-8%
Eu ইউরোপিয়াম 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"

Isotopes of Boron

Standard Atomic Weight


Stable Isotopes

151Eu 153Eu

Unstable Isotopes

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.