Definition:Gold
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Chemical Element
Gold is the chemical element that has $79$ protons in the nuclei of its atoms.
Its chemical symbol is $\text {Au}$.
Isotopes
Au-$197$
Gold-$197$ is the isotope of gold which has $118$ neutrons in addition to its $79$ protons.
Au-$197$ is the only stable isotope of gold.
Linguistic Note
The symbol Au used for gold derives from the Latin aurum.
Sources
- 1990: I.S. Grant and W.R. Phillips: Electromagnetism (2nd ed.) ... (previous) ... (next): Chapter $1$: Force and energy in electrostatics: $1.1$ Electric Charge