Naming Covalent Compounds(Type III) Worksheet Worksheet - Free Printable

Problem: Naming Covalent Compounds (Type III) Worksheet

The task involves:
1. Writing the formulas for given covalent compound names.
2. Writing the names for given covalent compound formulas.

#### Part 1: Writing Formulas for the Following Covalent Compounds

Covalent compounds are named using prefixes to indicate the number of atoms of each element in the molecule. Here are the steps and solutions:

1. Nitrogen tribromide
- Prefixes: "tri-" means 3, so there are 3 bromine atoms.
- Formula: \( \text{NBr}_3 \)

2. Hexaboron silicide
- Prefixes: "hexa-" means 6 boron atoms, and "silic" indicates silicon.
- Formula: \( \text{B}_6\text{Si} \)

3. Chlorine dioxide
- Prefixes: "di-" means 2 oxygen atoms.
- Formula: \( \text{ClO}_2 \)

4. Hydrogen iodide
- No prefix is needed since there is only one atom of each element.
- Formula: \( \text{HI} \)

5. Iodine pentafluoride
- Prefixes: "penta-" means 5 fluorine atoms.
- Formula: \( \text{IF}_5 \)

6. Dinitrogen trioxide
- Prefixes: "di-" means 2 nitrogen atoms, and "tri-" means 3 oxygen atoms.
- Formula: \( \text{N}_2\text{O}_3 \)

7. Ammonia (nitrogen trihydride)
- Prefixes: "tri-" means 3 hydrogen atoms.
- Formula: \( \text{NH}_3 \)

8. Phosphorus triiodide
- Prefixes: "tri-" means 3 iodine atoms.
- Formula: \( \text{PI}_3 \)

9. Dihydrogen oxide
- Prefixes: "di-" means 2 hydrogen atoms.
- Formula: \( \text{H}_2\text{O} \)

10. Diphosphorous pentoxide
- Prefixes: "di-" means 2 phosphorus atoms, and "penta-" means 5 oxygen atoms.
- Formula: \( \text{P}_2\text{O}_5 \)

#### Part 2: Writing Names for the Following Covalent Compounds

For this part, we need to use the prefixes corresponding to the subscripts in the formulas.

11. \( \text{P}_4\text{S}_5 \)
- Prefixes: "tetra-" for 4 phosphorus atoms, "penta-" for 5 sulfur atoms.
- Name: Tetraphosphorus pentasulfide

12. \( \text{O}_2 \)
- No prefix is needed since there are only 2 oxygen atoms.
- Name: Dioxygen or Oxygen gas

13. \( \text{SF}_6 \)
- Prefix: "hexa-" for 6 fluorine atoms.
- Name: Sulfur hexafluoride

14. \( \text{Si}_2\text{Br}_6 \)
- Prefixes: "di-" for 2 silicon atoms, "hexa-" for 6 bromine atoms.
- Name: Disilicon hexabromide

15. \( \text{SCl}_4 \)
- Prefix: "tetra-" for 4 chlorine atoms.
- Name: Silicon tetrachloride

16. \( \text{CH}_4 \)
- Prefix: "tetra-" for 4 hydrogen atoms.
- Name: Methane (or carbon tetrahydride)

17. \( \text{B}_2\text{Si} \)
- Prefix: "di-" for 2 boron atoms.
- Name: Diboron silicide

18. \( \text{NF}_3 \)
- Prefix: "tri-" for 3 fluorine atoms.
- Name: Nitrogen trifluoride

19. \( \text{H}_2\text{O} \)
- Prefix: "di-" for 2 hydrogen atoms.
- Name: Dihydrogen oxide (or water)

20. \( \text{N}_2\text{O}_5 \)
- Prefixes: "di-" for 2 nitrogen atoms, "penta-" for 5 oxygen atoms.
- Name: Dinitrogen pentoxide

Final Answers:

#### Part 1: Formulas
1. \( \boxed{\text{NBr}_3} \)
2. \( \boxed{\text{B}_6\text{Si}} \)
3. \( \boxed{\text{ClO}_2} \)
4. \( \boxed{\text{HI}} \)
5. \( \boxed{\text{IF}_5} \)
6. \( \boxed{\text{N}_2\text{O}_3} \)
7. \( \boxed{\text{NH}_3} \)
8. \( \boxed{\text{PI}_3} \)
9. \( \boxed{\text{H}_2\text{O}} \)
10. \( \boxed{\text{P}_2\text{O}_5} \)

#### Part 2: Names
11. \( \boxed{\text{Tetraphosphorus pentasulfide}} \)
12. \( \boxed{\text{Dioxygen}} \)
13. \( \boxed{\text{Sulfur hexafluoride}} \)
14. \( \boxed{\text{Disilicon hexabromide}} \)
15. \( \boxed{\text{Silicon tetrachloride}} \)
16. \( \boxed{\text{Methane}} \)
17. \( \boxed{\text{Diboron silicide}} \)
18. \( \boxed{\text{Nitrogen trifluoride}} \)
19. \( \boxed{\text{Dihydrogen oxide}} \)
20. \( \boxed{\text{Dinitrogen pentoxide}} \)

Final Answer Boxed:
\[
\boxed{
\begin{array}{ll}
\text{Part 1:} & \text{1. NBr}_3, \text{2. B}_6\text{Si}, \text{3. ClO}_2, \text{4. HI}, \text{5. IF}_5, \text{6. N}_2\text{O}_3, \text{7. NH}_3, \text{8. PI}_3, \text{9. H}_2\text{O}, \text{10. P}_2\text{O}_5 \\
\text{Part 2:} & \text{11. Tetraphosphorus pentasulfide}, \text{12. Dioxygen}, \text{13. Sulfur hexafluoride}, \text{14. Disilicon hexabromide}, \text{15. Silicon tetrachloride}, \text{16. Methane}, \text{17. Diboron silicide}, \text{18. Nitrogen trifluoride}, \text{19. Dihydrogen oxide}, \text{20. Dinitrogen pentoxide}
\end{array}
}
\]