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Bohrium (Bh)

Bohrium is a chemical element of the periodic table with chemical symbol Bh and atomic number 107 with an atomic weight of 270.133 u and is classed as transition metal and is part of group 7 (manganese group). Bohrium is solid at room temperature.

Bohrium in the periodic table

SymbolBh
Atomic number107
Group7 (Manganese group)
Period7
Blockd
ClassificationTransition Metal
Appearance-
Color-
Number of protons107 p+
Number of neutrons163 n0
Number of electrons107 e-
From Wikipedia, the free encyclopediaBohrium is a chemical element with symbol Bh and atomic number 107. It is named after Danish physicist Niels Bohr. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, 270Bh, has a half-life of approximately 61 seconds.

Physical properties

Phase at STPSolid
Density37.1 g/cm3
Atomic weight270.133 u

Thermal properties

Melting point-
Boiling point-
Heat of vaporization-

Atomic properties

Electronegativity (Pauling Scale)-
Electron affinity-
Oxidation states(+3), (+4), (+5), +7
(parenthesized: prediction)
Ionization energies
  1. 742.9 kJ/mol
  2. 1688.5 kJ/mol
  3. 2566.5 kJ/mol
  4. 3598.9 kJ/mol
  5. 4727.8 kJ/mol
  6. 5991.7 kJ/mol
  7. 7226.8 kJ/mol

Electron configuration for bohrium

Electron configuration
Shorthand configuration
[Rn] 5f14 6d5 7s2
Electron configuration
Full configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d5 7s2
Electron configuration chart
1s2
2s22p6
3s23p63d10
4s24p64d104f14
5s25p65d105f14
6s26p66d5
7s2
Electrons per shell2, 8, 18, 32, 32, 13, 2
Valence electrons 2
Valency electrons 7
Bohr model
BohriumElectron shell for Bohrium, created by Injosoft ABBh
Figure: Shell diagram of Bohrium (Bh) atom.
Orbital Diagram
1s
2s2p
3s3p3d
4s4p4d4f
5s5p5d5f
6s6p6d
7s

The history of Bohrium

DiscoveryGesellschaft für Schwerionenforschung (1981)

Identifiers

List of unique identifiers for Bohrium in various chemical registry databases
CAS Number54037-14-8
ChemSpider ID-
EC number-
PubChem CID Number56951713