Question: A. A main group element with the valence electron configuration 2s 2 2p 5 is in periodic group . It forms a monatomic ion with

A. A main group element with the valence electron configuration 2s ²2p ⁵ is in periodic group .
It forms a monatomic ion with a charge of .

B. A main group element with the valence electron configuration 4s ² is in periodic group .
It forms a monatomic ion with a charge of .

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