Which of the following atoms can expand its valence shell? ?

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1 Answer

  • S, Cl, Se and Al are all able to expand their valence shell. H and F cannot.

    expanded valence shells occur when an atom has empty d orbitals in their valence shell (period 3 or higher). Look it up in your chem book and it will help a lot. This is very important to know especially when drawing lewis structures.

    P.S. it’s also good to know that Be, B, and Al commonly have fewer than an octet.

    Source(s): Just going to class and studying.

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