Question

give the systematic name of each covalent compound. spelling counts. sf₄: p₄s₃: co: p₃n₅:

Explanation:

For covalent compounds, prefixes are used to indicate the number of atoms of each element. "Mono -" is usually not used for the first element.

1. In $SF_4$, there is 1 sulfur atom and 4 fluorine atoms. The prefix for 4 is "tetra -", so it is sulfur tetrafluoride.
2. In $P_4S_3$, there are 4 phosphorus atoms and 3 sulfur atoms. The prefix for 4 is "tetra -" and for 3 is "tri -", so it is tetraphosphorus trisulfide.
3. In $CO$, there is 1 carbon atom and 1 oxygen atom. The prefix for 1 is usually not used for the first - named element, and "mono -" is used for the second - named element, so it is carbon monoxide.
4. In $P_3N_5$, there are 3 phosphorus atoms and 5 nitrogen atoms. The prefix for 3 is "tri -" and for 5 is "penta -", so it is triphosphorus pentanitride.

Answer:

SF₄: Sulfur tetrafluoride
P₄S₃: Tetraphosphorus trisulfide
CO: Carbon monoxide
P₃N₅: Triphosphorus pentanitride