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List three atoms or ions that have the same number of
electrons as each of the following:
(a) S2− (b) Al3+ (c) P3− (d) Kr (e) Cs+

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Respuesta :

Answer:

a b and c

Explanation:

S is in period 3 so it has 3 electrons

Al is in period 3 so it has 3 electrons

P is in period 3 so it has 3 electrons

Kr is in period 4 so it has 4 electrons

Cs is in period 6 so it has 6 electrons

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