Hyphen notation with the mass number blank (oxygen-18)

An example figure from the Nuclide Notation generator.

The hyphen notation oxygen- followed by a blank line for the mass number — Hyphen notation for an isotope of oxygen with its mass number left as a line to write on, for students to work out from the protons and neutrons they’re given. The isotope is oxygen-18.

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Answer key

Oxygen-18 atom
8 protons, 10 neutrons, 8 electrons
Blank: mass number 18

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