Write the formula: calcium oxide sulfur oxide (4) phosphorus oxide (5) copper oxide (2) iron oxide (2) chromium oxide (6)

univerkov | March 19, 2021 | education

1) calcium oxide – CaO;
2) sulfur oxide (4) – SO2;
3) phosphorus oxide (5) – P2O5;
4) copper oxide (2) – CuO;
5) iron oxide (2) – FeO;
6) chromium oxide (6) – CrO3.
To write these compounds, it is necessary to take into account the valence of the elements, for oxygen (O) the valency is always 2.

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