Question
The carbonate ion, $\mathrm{CO}_{3}^{2-}$, contains a double bond. Draw a Lewis structure for the ion and show why it has a charge of -2 .
Step 1
Carbon has 4 valence electrons, each oxygen atom has 6, and the ion has an extra 2 electrons due to its -2 charge. Therefore, the total number of valence electrons is $4 + 3 \times 6 + 2 = 24$. Show more…
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