• Class: SuperHeavies
• Period: 7
• IUPAC group: 7
• Traditional: VIIa

• Discovered in: 1981 by Armbruster, Munzenberf et.al, GSI, Darmstadt, Germany
• Origin of name: Niels Bohr: Atomic theory pioneer
• Historical or alternate name: Unnilseptium (structural)

~0.0

• Atmosphere: ~0.0 ppm
• Primitive mantle: ~0.0 ppm
• Sea water: ~0.0 ppm
• Metallic meteorite: ~0.0 ppm
• ConTinental crust: ~0.0 ppm
• Solar photosphere: ~0.0 log of abundance
• Oceanic crust: ~0.0 ppm
• Solar system: ~0.0 relative to Si=1.0e6

   Hazards

Radioactive..

• Lower:
• Upper:

Bohrium Physical Properties

 Transitional Data

• State: Solid
• Density: 27.2 g/cm3

 Molar enthalpy

• Atomization: kJ mol-1
• Fusion: kJ mol-1
• Vaporization: kJ mol-1

 Transition points

• MelTing point: K
• Boiling point: K
• Critical temperature: K

 Molar properties

• Atomic weight: 262.1229 g/mole
• Molar volume: cm3 mol-1

 Crystal structure sequence

 Thermodynamics

 Miscellaneous physical

• Electrical resistivity: µ-ohms/cm
• Debye temperature: K
• Thermal conductivity: W / m / K
• Coefficient of linear expansion: Coef. per K
• Mass magnetic susceptibility:
• X-ray diffraction mass absorption coefficients:
• CuK: (µ/p)/cm2 g-1
• MoK: (µ/p)/cm2 g-1

Bohrium Chemical Properties

 Chemical basics:

• Oxidation states:
• Molecular wt: 262.1229 g/mole

 Radii

• Covalent: pm
• Atomic: 145.0 pm
• Van der Waals: pm

 Ions:

• ion: +5 pm 83.0

 Covalent bonds

 Effective nuclear charge

• Slater:
• Clementi:
• Froese-Fischer:

 Electronegativity

• Pauling:
• Allred-Rochow:

 Standard reactions

Bohrium Nuclear Properties

• Known
• Listed 0

• Known
• Listed

Bohrium Energy Properties

Electrons

• Ground state electron configuration: [Rn] 5f14 6d5 7s2
• Electron affinity: kJ mol-1
• Filling orbitals:

 Ionization energies

 Atomic energy levels