Worksheet for practicing the naming of chemical compounds and writing their formulas.

Naming Chemical Compounds Worksheet Solution

The task is to provide the proper names or formulas for the given chemical compounds. Below are the solutions with explanations.

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#### Part 1: Provide Names for the Given Formulas

1. NaBr
- Sodium bromide
- Explanation: Sodium (Na) is a metal, and bromine (Br) is a nonmetal. The name follows the format "metal + nonmetal."

2. CaO
- Calcium oxide
- Explanation: Calcium (Ca) is a metal, and oxygen (O) is a nonmetal. The name follows the format "metal + nonmetal."

3. Li₂S
- Lithium sulfide
- Explanation: Lithium (Li) is a metal, and sulfur (S) is a nonmetal. The subscript indicates two lithium atoms per formula unit.

4. MgBr₂
- Magnesium bromide
- Explanation: Magnesium (Mg) is a metal, and bromine (Br) is a nonmetal. The subscript indicates two bromine atoms per formula unit.

5. Pu(OH)₃
- Plutonium(III) hydroxide
- Explanation: Plutonium (Pu) is a metal with a variable oxidation state. The "(III)" indicates a +3 charge, and hydroxide (OH) is a polyatomic ion.

6. Hg(CN)₂
- Mercury(II) cyanide
- Explanation: Mercury (Hg) is a metal with a variable oxidation state. The "(II)" indicates a +2 charge, and cyanide (CN) is a polyatomic ion.

7. Mo(C₂H₃O₂)₄
- Molybdenum(IV) acetate
- Explanation: Molybdenum (Mo) is a metal with a variable oxidation state. The "(IV)" indicates a +4 charge, and acetate (C₂H₃O₂) is a polyatomic ion.

8. Cr(CrO₄)₃
- Chromium(III) chromate
- Explanation: Chromium (Cr) is a metal with a variable oxidation state. The "(III)" indicates a +3 charge, and chromate (CrO₄) is a polyatomic ion.

9. WO₂
- Tungsten(IV) oxide
- Explanation: Tungsten (W) is a metal with a variable oxidation state. The "(IV)" indicates a +4 charge, and oxygen (O) is a nonmetal.

10. Mn(ClO)₂
- Manganese(II) hypochlorite
- Explanation: Manganese (Mn) is a metal with a variable oxidation state. The "(II)" indicates a +2 charge, and hypochlorite (ClO) is a polyatomic ion.

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#### Part 2: Provide Formulas for the Given Names

11. potassium dichromate
- K₂Cr₂O₇
- Explanation: Potassium (K) is a metal with a +1 charge, and dichromate (Cr₂O₇²⁻) is a polyatomic ion with a -2 charge. The subscripts balance the charges.

12. gold(III) oxide
- Au₂O₃
- Explanation: Gold (Au) has a +3 charge in this compound, and oxygen (O) has a -2 charge. The subscripts balance the charges.

13. aluminum periodate
- Al(IO₄)₃
- Explanation: Aluminum (Al) has a +3 charge, and periodate (IO₄⁻) is a polyatomic ion with a -1 charge. The subscripts balance the charges.

14. barium nitrite
- Ba(NO₂)₂
- Explanation: Barium (Ba) has a +2 charge, and nitrite (NO₂⁻) is a polyatomic ion with a -1 charge. The subscripts balance the charges.

15. silver carbonate
- Ag₂CO₃
- Explanation: Silver (Ag) has a +1 charge, and carbonate (CO₃²⁻) is a polyatomic ion with a -2 charge. The subscripts balance the charges.

16. lithium sulfite
- Li₂SO₃
- Explanation: Lithium (Li) has a +1 charge, and sulfite (SO₃²⁻) is a polyatomic ion with a -2 charge. The subscripts balance the charges.

17. zinc hydrogen carbonate
- Zn(HCO₃)₂
- Explanation: Zinc (Zn) has a +2 charge, and hydrogen carbonate (HCO₃⁻) is a polyatomic ion with a -1 charge. The subscripts balance the charges.

18. iron(III) hydroxide
- Fe(OH)₃
- Explanation: Iron (Fe) has a +3 charge in this compound, and hydroxide (OH⁻) is a polyatomic ion with a -1 charge. The subscripts balance the charges.

19. ammonium phosphate
- (NH₄)₃PO₄
- Explanation: Ammonium (NH₄⁺) has a +1 charge, and phosphate (PO₄³⁻) is a polyatomic ion with a -3 charge. The subscripts balance the charges.

20. copper(II) bromate
- Cu(BrO₃)₂
- Explanation: Copper (Cu) has a +2 charge in this compound, and bromate (BrO₃⁻) is a polyatomic ion with a -1 charge. The subscripts balance the charges.

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#### Part 3: Provide Names for the Given Formulas

21. SO₃
- Sulfur trioxide
- Explanation: Sulfur (S) is a nonmetal, and oxygen (O) is a nonmetal. The prefix "tri-" indicates three oxygen atoms.

22. N₂S
- Dinitrogen sulfide
- Explanation: Nitrogen (N) is a nonmetal, and sulfur (S) is a nonmetal. The prefix "di-" indicates two nitrogen atoms.

23. BF₃
- Boron trifluoride
- Explanation: Boron (B) is a nonmetal, and fluorine (F) is a nonmetal. The prefix "tri-" indicates three fluorine atoms.

24. P₂Br₄
- Diphosphorus tetrabromide
- Explanation: Phosphorus (P) is a nonmetal, and bromine (Br) is a nonmetal. The prefix "di-" indicates two phosphorus atoms, and "tetra-" indicates four bromine atoms.

25. SiO₂
- Silicon dioxide
- Explanation: Silicon (Si) is a nonmetal, and oxygen (O) is a nonmetal. The prefix "di-" indicates two oxygen atoms.

26. SF₆
- Sulfur hexafluoride
- Explanation: Sulfur (S) is a nonmetal, and fluorine (F) is a nonmetal. The prefix "hexa-" indicates six fluorine atoms.

27. NO₂
- Nitrogen dioxide
- Explanation: Nitrogen (N) is a nonmetal, and oxygen (O) is a nonmetal. The prefix "di-" indicates two oxygen atoms.

28. nitrogen trichloride
- NCl₃
- Explanation: Nitrogen (N) is a nonmetal, and chlorine (Cl) is a nonmetal. The prefix "tri-" indicates three chlorine atoms.

29. dinitrogen trioxide
- N₂O₃
- Explanation: Nitrogen (N) is a nonmetal, and oxygen (O) is a nonmetal. The prefix "di-" indicates two nitrogen atoms, and "tri-" indicates three oxygen atoms.

30. phosphorus pentafluoride
- PF₅
- Explanation: Phosphorus (P) is a nonmetal, and fluorine (F) is a nonmetal. The prefix "penta-" indicates five fluorine atoms.

31. diboron tetrahydride
- B₂H₄
- Explanation: Boron (B) is a nonmetal, and hydrogen (H) is a nonmetal. The prefix "di-" indicates two boron atoms, and "tetra-" indicates four hydrogen atoms.

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Final Answer

\[
\boxed{
\begin{array}{ll}
1. & \text{Sodium bromide} \\
2. & \text{Calcium oxide} \\
3. & \text{Lithium sulfide} \\
4. & \text{Magnesium bromide} \\
5. & \text{Plutonium(III) hydroxide} \\
6. & \text{Mercury(II) cyanide} \\
7. & \text{Molybdenum(IV) acetate} \\
8. & \text{Chromium(III) chromate} \\
9. & \text{Tungsten(IV) oxide} \\
10. & \text{Manganese(II) hypochlorite} \\
11. & \text{K}_2\text{Cr}_2\text{O}_7 \\
12. & \text{Au}_2\text{O}_3 \\
13. & \text{Al(IO}_4\text{)}_3 \\
14. & \text{Ba(NO}_2\text{)}_2 \\
15. & \text{Ag}_2\text{CO}_3 \\
16. & \text{Li}_2\text{SO}_3 \\
17. & \text{Zn(HCO}_3\text{)}_2 \\
18. & \text{Fe(OH)}_3 \\
19. & (\text{NH}_4)_3\text{PO}_4 \\
20. & \text{Cu(BrO}_3\text{)}_2 \\
21. & \text{Sulfur trioxide} \\
22. & \text{Dinitrogen sulfide} \\
23. & \text{Boron trifluoride} \\
24. & \text{Diphosphorus tetrabromide} \\
25. & \text{Silicon dioxide} \\
26. & \text{Sulfur hexafluoride} \\
27. & \text{Nitrogen dioxide} \\
28. & \text{NCl}_3 \\
29. & \text{N}_2\text{O}_3 \\
30. & \text{PF}_5 \\
31. & \text{B}_2\text{H}_4 \\
\end{array}
}
\]