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# AP® Chemistry

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APCHEM-K0NILU

Which element will have the MOST similar atomic radius to oxygen?

A

$Se$

Its valence electrons are in similar orbitals to $O$.

B

$P$

The number of electrons in this element is closest to that of $O$.

C

$S$

It is in the same group as $O$.

D

$Cl$

It has a stronger effective nuclear charge for its period.