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Periodic table
Period 7Group 7
107Unknown
Bh 272 Atomic mass · u
Transition metals

Bohrium

Bohrium 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.

Discovery 1976 (Gesellschaft für Schwerionenforschung)
Bohrium electron shellsBh107 protons
K2L8M18N32O32P13Q2
A simplified shell model. Electron positions are illustrative.

Physical properties

Values for the element in its standard state.

Density
Not available
Melting point
Not available
Boiling point
Not available
Atomic radius
Not available
Bonding type
Not recorded
Molar heat
Not available

Inside the atom

Electron arrangement and the energy behind its behavior.

Full electron configuration

1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 10 electrons; 5s, 2 electrons; 5p, 6 electrons; 4f, 14 electrons; 5d, 10 electrons; 6s, 2 electrons; 6p, 6 electrons; 5f, 14 electrons; 6d, 5 electrons; 7s, 2 electrons;

[Rn] represents 86 core electrons. The full view shows them explicitly.

107 electrons Orbital order preserved from source

Electronegativity
Not availablePauling scale
First ionization energy
Not available
Electron affinity
Not available
Van der Waals radius
Not available

About bohrium

Appearance
Not recorded
Discovery
1976 (Gesellschaft für Schwerionenforschung)

A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.