This chemistry worksheet challenges students to write chemical formulas and determine if compounds are ionic or covalent.

Let's solve this Ionic & Covalent Compounds Worksheet step by step.

We need to:
1. Write the chemical formula for each compound.
2. Classify each as ionic (I) or covalent (C).

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🔹 General Rules:

- Ionic compounds: Typically form between a metal and a nonmetal (or polyatomic ion).
- Covalent compounds: Form between two nonmetals (often with prefixes like di-, tri-, etc.).

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Now, let’s go through each one:

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1. lithium chloride
- Li⁺ and Cl⁻ → LiCl
- Metal + nonmetal → Ionic (I)
✔ LiCl, I

2. ammonium permanganate
- NH₄⁺ and MnO₄⁻ → NH₄MnO₄
- Polyatomic ions → Ionic (I)
✔ NH₄MnO₄, I

3. silver nitrate
- Ag⁺ and NO₃⁻ → AgNO₃
- Metal + polyatomic ion → Ionic (I)
✔ AgNO₃, I

4. zinc hydroxide
- Zn²⁺ and OH⁻ → Zn(OH)₂
- Metal + polyatomic ion → Ionic (I)
✔ Zn(OH)₂, I

5. carbon disulfide
- C and S (both nonmetals), "di" means 2 sulfurs → CS₂
- Nonmetal + nonmetal → Covalent (C)
✔ CS₂, C

6. iron(III) phosphate
- Fe³⁺ and PO₄³⁻ → FePO₄
- Metal + polyatomic ion → Ionic (I)
✔ FePO₄, I

7. copper(I) iodide
- Cu⁺ and I⁻ → CuI
- Metal + nonmetal → Ionic (I)
✔ CuI, I

8. tin(IV) fluoride
- Sn⁴⁺ and F⁻ → SnF₄
- Metal + nonmetal → Ionic (I)
✔ SnF₄, I

9. barium dichromate
- Ba²⁺ and Cr₂O₇²⁻ → BaCr₂O₇
- Metal + polyatomic ion → Ionic (I)
✔ BaCr₂O₇, I

10. beryllium nitrite
- Be²⁺ and NO₂⁻ → Be(NO₂)₂
- Metal + polyatomic ion → Ionic (I)
✔ Be(NO₂)₂, I

11. sulfur trioxide
- S and O (both nonmetals), "tri" = 3 oxygens → SO₃
- Nonmetal + nonmetal → Covalent (C)
✔ SO₃, C

12. calcium bromide
- Ca²⁺ and Br⁻ → CaBr₂
- Metal + nonmetal → Ionic (I)
✔ CaBr₂, I

13. lead(IV) carbonate
- Pb⁴⁺ and CO₃²⁻ → Pb(CO₃)₂
- Metal + polyatomic ion → Ionic (I)
✔ Pb(CO₃)₂, I

14. carbon tetrafluoride
- C and F (both nonmetals), "tetra" = 4 fluorines → CF₄
- Nonmetal + nonmetal → Covalent (C)
✔ CF₄, C

15. strontium sulfide
- Sr²⁺ and S²⁻ → SrS
- Metal + nonmetal → Ionic (I)
✔ SrS, I

16. aluminum acetate
- Al³⁺ and CH₃COO⁻ (acetate) → Al(CH₃COO)₃
- Metal + polyatomic ion → Ionic (I)
✔ Al(C₂H₃O₂)₃ or Al(CH₃COO)₃, I

17. sodium bicarbonate
- Na⁺ and HCO₃⁻ → NaHCO₃
- Metal + polyatomic ion → Ionic (I)
✔ NaHCO₃, I

18. tin(II) iodide
- Sn²⁺ and I⁻ → SnI₂
- Metal + nonmetal → Ionic (I)
✔ SnI₂, I

19. boron trichloride
- B and Cl (both nonmetals), "tri" = 3 chlorines → BCl₃
- Nonmetal + nonmetal → Covalent (C)
✔ BCl₃, C

20. dibromine pentoxide
- Br and O (both nonmetals), "di" = 2 Br, "penta" = 5 O → Br₂O₅
- Nonmetal + nonmetal → Covalent (C)
✔ Br₂O₅, C

21. ammonia
- N and H (both nonmetals) → NH₃
- Covalent molecule → Covalent (C)
✔ NH₃, C

22. silicon dioxide
- Si and O (both nonmetals) → SiO₂
- Nonmetal + nonmetal → Covalent (C)
✔ SiO₂, C

23. tetrásulfur tetranitride
- S and N (both nonmetals), "tetra" = 4 each → S₄N₄
- Covalent molecular compound → Covalent (C)
✔ S₄N₄, C

24. magnesium phosphide
- Mg²⁺ and P³⁻ → Mg₃P₂
- Metal + nonmetal → Ionic (I)
✔ Mg₃P₂, I

25. copper(I) bisulfite
- Cu⁺ and HSO₃⁻ → CuHSO₃
- Metal + polyatomic ion → Ionic (I)
✔ CuHSO₃, I

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✔ Final Answer Table:

| Compound | Formula | I or C |
|--------|--------|--------|
| lithium chloride | LiCl | I |
| ammonium permanganate | NH₄MnO₄ | I |
| silver nitrate | AgNO₃ | I |
| zinc hydroxide | Zn(OH)₂ | I |
| carbon disulfide | CS₂ | C |
| iron(III) phosphate | FePO₄ | I |
| copper(I) iodide | CuI | I |
| tin(IV) fluoride | SnF₄ | I |
| barium dichromate | BaCr₂O₇ | I |
| beryllium nitrite | Be(NO₂)₂ | I |
| sulfur trioxide | SO₃ | C |
| calcium bromide | CaBr₂ | I |
| lead(IV) carbonate | Pb(CO₃)₂ | I |
| carbon tetrafluoride | CF₄ | C |
| strontium sulfide | SrS | I |
| aluminum acetate | Al(C₂H₃O₂)₃ | I |
| sodium bicarbonate | NaHCO₃ | I |
| tin(II) iodide | SnI₂ | I |
| boron trichloride | BCl₃ | C |
| dibromine pentoxide | Br₂O₅ | C |
| ammonia | NH₃ | C |
| silicon dioxide | SiO₂ | C |
| tetrásulfur tetranitride | S₄N₄ | C |
| magnesium phosphide | Mg₃P₂ | I |
| copper(I) bisulfite | CuHSO₃ | I |

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📌 Summary:

- Ionic (I): Most metal + nonmetal or metal + polyatomic ion combinations.
- Covalent (C): All nonmetal + nonmetal combinations (especially with prefixes).

Let me know if you'd like this formatted as a downloadable file or need explanations for any specific compound!