Chlorine-37 ion symbol (³⁷Cl⁻)

An example figure from the Nuclide Notation generator.

The symbol of the chlorine-37 ion: Cl with mass number 37 at the top left and a minus charge at the top right, with an answer key under it — The isotope symbol of a chloride ion of chlorine-37: Cl with its mass number, 37, at the top left and its 1− charge, written as a minus sign, at the top right. The atomic number is left off, as many textbooks write it. The answer key under it gives the ion’s protons, neutrons and electrons.

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Answer key

Chlorine-37 ion, Cl⁻
17 protons, 20 neutrons, 18 electrons

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