Выполни задание

Определи валентность элементов в соединениях и выбери её над элементами.

[ \(\text{II}\) | \(\text{IV}\) | \(\text{VI}\) ][ \(\text{II}\) | \(\text{I}\) | \(\text{III}\) ]

\(\mathrm{C}\) \(\mathrm{O\_2}\)

[ \(\text{II}\) | \(\text{IV}\) | \(\text{VI}\) ][ \(\text{II}\) | \(\text{I}\) | \(\text{III}\) ]

\(\mathrm{C}\) \(\mathrm{H\_4}\)

[ \(\text{II}\) | \(\text{I}\) | \(\text{III}\) ][ \(\text{II}\) | \(\text{I}\) | \(\text{III}\) ]

\(\mathrm{N}\) \(\mathrm{H\_3}\)

[ \(\text{II}\) | \(\text{I}\) | \(\text{III}\) ][ \(\text{II}\) | \(\text{I}\) | \(\text{III}\) ]

\(\mathrm{Fe\_2}\) \(\mathrm{O\_3}\)