Bohrium element | Periodic Table of the Chemical Elements

General information about Bohrium

Name:

Bohrium

Symbol:

Number:

107

Element category:

Transition Metals

Group:

Period:

Block:

Appearance:

radioactive synthetic metal

Standard atomic weight:

[270] g·mol^-1

Electron configuration:

1s² 2s²p⁶ 3s²p⁶d¹⁰ 4s²p⁶d¹⁰f¹⁴

5s²p⁶d¹⁰f¹⁴ 6s²p⁶d⁵ 7s²

Electrons per shell:

2, 8, 18, 32, 32, 13, 2

Physical properties of Bohrium

Phase:

solid

Density:

Melting point:

Boiling point:

Triple point:

Critical point:

Heat of fusion:

Heat of vaporization:

Specific heat capacity
(25 °C):

Electronegativity:

Atomic structure of Bohrium

Atomic radius:

Atomic volume:

Covalent radius:

Cross section sigma

a/barns:

Crystal structure:

Ionic radius:

Filling orbital:

Number of electrons:

107

Number of neutrons:

155

Number of protons:

107

Oxidation states:

Valence electrons:

Electron dot
model

Other languages

Bohrium is a man-made element. In 1976, Soviet scientists at Dubna announced they had synthesized element 107 by bombarding Bi-204 with heavy nuclei of Cr-54. There are reports that the element was 'glimpsed' for 2/1000 s in 1975. Bohrium was produced by bombarding a rapidly rotating cylinder target, coated with a thin layer of bismuth metal, with a stream of tangentially fired Cr-54 ions. West German physicists at the Heavy Ion Research Laboratory at Darmstadt verified the existence of element 107, creating and identifying six nuclei of Bohrium.

Pictures

Bohrium - Bh, 107

General information about Bohrium

Physical properties of Bohrium

Atomic structure of Bohrium

Other languages

Brief description

Uses of Bohrium

Hystory of Bohrium

Periodic table of chemical elements