Chemistry 5070 · O Level · Atomic structure and the Periodic Table

Atomic structure and the Periodic Table — practice question

The data given below could apply either to the atom or to the ion of the same element. • electronic configuration $2,8,8$ • nucleon number $40$ • proton number $20$ Which element is shown by these data?

Aargon
Bcalcium
Cchlorine
Dneon

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