## Chemistry: Molecular Approach (4th Edition)

Published by Pearson

# Chapter 9 - Exercises: 39

#### Answer

The Lewis symbols are shown in the attached image

#### Work Step by Step

a) NaF is made of $Na^+$ and $F^-$. b) CaO is made of $Ca^{2+}$ and $O^{2-}$. c) $SrBr_2$ is made of $Sr^{2+}$ and 2 $Br^-$. d) $K_2O$ is made of 2 $K^{+}$ and $O^{2-}$. The cations have no valence electrons, and the anions have full octets.

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