When main group elements react, they tend to acquire eight outer$-$shell electrons $($

$n{s}^{2}n{p}^6).$ This is called an octet, and it is a particularly stable configuration

Nonmetals in the third period and beyond can break the octet rule because they have

vacant $d$ orbitals that allow them to accommodate more than eight outer$-$shell electrons.

If the following elements were involved in redox reactions, which noble$-$gas configuration would they most likely attain?

Drag the appropriate elements to their respective bins.

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Part B

$Ca$

O

$Cl$

Po