Question

directions: write the names of the following covalent compounds:

1. so₃
2. n₂s
3. ph₃
4. br₃
5. p₄br₄

directions: write the formulas of the following covalent compounds:

1. nitrogen trichloride
2. boron monocarbide
3. dinitrogen trioxide
4. phosphorus pentafluoride
5. tetraphosphorus decoxide

Explanation:

Step1: Name the compound \(SO_3\)

The prefix "tri - " is used for three atoms. So, it is sulfur trioxide.

Step2: Name the compound \(N_2S\)

The prefix "di - " for two nitrogen atoms and "mono - " (usually omitted for the second element when there's one atom, but here we can think of naming rules). It is dinitrogen sulfide.

Step3: Name the compound \(PH_3\)

It is named phosphorus trihydride (common name phosphine also exists).

Step4: Name the compound \(Br_3\)

This is not a valid covalent compound as bromine exists as \(Br_2\) in its elemental form in normal conditions. But if we follow naming rules for \(Br_3\) (assuming some hypothetical case), it would be tribromine.

Step5: Name the compound \(P_4Br_4\)

Using prefixes, it is tetraphosphorus tetrabromide.

Step6: Write formula for nitrogen trichloride

The prefix "tri - " for three chlorine atoms. The formula is \(NCl_3\).

Step7: Write formula for boron monocarbide

The prefix "mono - " (usually omitted for the first element when there's one atom, but here we follow the rule). The formula is \(BC\).

Step8: Write formula for dinitrogen trioxide

The prefix "di - " for two nitrogen and "tri - " for three oxygen atoms. The formula is \(N_2O_3\).

Step9: Write formula for phosphorus pentafluoride

The prefix "penta - " for five fluorine atoms. The formula is \(PF_5\).

Step10: Write formula for tetraphosphorus decoxide

The prefix "tetra - " for four phosphorus and "deca - " for ten oxygen atoms. The formula is \(P_4O_{10}\).

Answer:

1. Sulfur trioxide
2. Dinitrogen sulfide
3. Phosphorus trihydride (or phosphine)
4. Tribromine
5. Tetraphosphorus tetrabromide
6. \(NCl_3\)
7. \(BC\)
8. \(N_2O_3\)
9. \(PF_5\)
10. \(P_4O_{10}\)