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Beryllium for example would be.

7 2

Be

4

7= The mass number (+Protons and +/- neutrons added)

4 = The +protons

2 = The oxidation state. Beryllium would have 2 valance -electrons, hence the two. It has to lose 2 -electrons to be stable. For a metal it would be how many electrons it has to gain to be stable (Full valence shell).

Be = Is obviously the symbol of the element.

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