Definition:Tungsten
Chemical Element
Tungsten is the chemical element that has $74$ protons in the nuclei of its atoms.
Its chemical symbol is $\text W$.
Isotopes
W-$180$
Tungsten-$180$ is the isotope of Tungsten which has $106$ neutrons in addition to its $74$ protons.
W-$180$ is radioactive, with a half-life of approximately $1.8 \times 10^{18}$ years.
W-$180$ forms $0.12 \%$ of the naturally occurring Tungsten.
W-$181$
Tungsten-$181$ is the isotope of Tungsten which has $107$ neutrons in addition to its $74$ protons.
W-$181$ is radioactive, with a half-life of approximately $121.2$ days.
W-$181$ does not occur naturally.
W-$182$
Tungsten-$182$ is the isotope of Tungsten which has $108$ neutrons in addition to its $74$ protons.
W-$182$ is one of the $4$ stable isotopes of Tungsten, forming $26.50 \%$ of the naturally occurring Tungsten.
W-$183$
Tungsten-$183$ is the isotope of Tungsten which has $109$ neutrons in addition to its $74$ protons.
W-$183$ is one of the $4$ stable isotopes of Tungsten, forming $14.31 \%$ of the naturally occurring Tungsten.
W-$184$
Tungsten-$184$ is the isotope of Tungsten which has $110$ neutrons in addition to its $74$ protons.
W-$184$ is the most abundant of the $4$ stable isotopes of Tungsten, forming $30.64 \%$ of the naturally occurring Tungsten.
W-$185$
Tungsten-$185$ is the isotope of Tungsten which has $111$ neutrons in addition to its $74$ protons.
W-$185$ is radioactive, with a half-life of approximately $75.1$ days.
W-$185$ does not occur naturally.
W-$186$
Tungsten-$186$ is the isotope of Tungsten which has $112$ neutrons in addition to its $74$ protons.
W-$186$ is one of the $4$ stable isotopes of Tungsten, forming $28.43 \%$ of the naturally occurring Tungsten.
Also known as
Tungsten is also known as wolfram.
Linguistic Note
The word tungsten derives from the Swedish for heavy stone.
The symbol W used for tungsten derives from its Germanic name wolfram, which is derived from German wolf rahm (meaning wolf soot, wolf cream or wolf foam).