Covalent and ionic bonds worksheet - Free Printable

Let’s go through each compound one by one. We’ll figure out:

1. The name of the compound.
2. Whether it’s ionic (I) or covalent (C).

Remember:
- Ionic compounds usually have a metal + nonmetal (or polyatomic ion).
- Covalent compounds are made of nonmetals only.

We’ll use naming rules:
- For ionic: name the metal first, then the nonmetal with “-ide” ending (unless it’s a polyatomic ion — like sulfate, carbonate, etc.).
- For covalent: use prefixes like mono-, di-, tri-, tetra-, penta-, hexa-, hepta-, octa-, nona-, deca- to show how many atoms. (But we skip “mono-” on the first element.)

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1. ZnSO₄

- Zinc is a metal. SO₄ is sulfate (polyatomic ion).
→ Name: Zinc sulfate
→ Ionic? Yes → I

2. NF₃

- Nitrogen and fluorine — both nonmetals.
→ Use prefixes: N = nitrogen, F₃ = trifluoride → Nitrogen trifluoride
→ Covalent → C

3. Al₂O₃

- Aluminum (metal) + Oxygen (nonmetal)
→ Name: Aluminum oxide (no prefix needed for ionic)
→ Ionic → I

4. CO₂

- Carbon + oxygen — both nonmetals.
→ C = carbon, O₂ = dioxide → Carbon dioxide
→ Covalent → C

5. CCl₄

- Carbon + chlorine — both nonmetals.
→ C = carbon, Cl₄ = tetrachloride → Carbon tetrachloride
→ Covalent → C

6. K₂CO₃

- Potassium (metal) + CO₃ (carbonate ion)
→ Name: Potassium carbonate
→ Ionic → I

7. CS₂

- Carbon + sulfur — both nonmetals.
→ C = carbon, S₂ = disulfide → Carbon disulfide
→ Covalent → C

8. Ca₃N₂

- Calcium (metal) + Nitrogen (nonmetal)
→ Name: Calcium nitride
→ Ionic → I

9. AlPO₄

- Aluminum (metal) + PO₄ (phosphate ion)
→ Name: Aluminum phosphate
→ Ionic → I

10. P₂O₃

- Phosphorus + oxygen — both nonmetals.
→ P₂ = diphosphorus, O₃ = trioxide → Diphosphorus trioxide
→ Covalent → C

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Final Answer:

| # | Compound | Name | I or C |
|---|----------|-----------------------|--------|
| 1 | ZnSO₄ | Zinc sulfate | I |
| 2 | NF₃ | Nitrogen trifluoride | C |
| 3 | Al₂O₃ | Aluminum oxide | I |
| 4 | CO₂ | Carbon dioxide | C |
| 5 | CCl₄ | Carbon tetrachloride | C |
| 6 | K₂CO₃ | Potassium carbonate | I |
| 7 | CS₂ | Carbon disulfide | C |
| 8 | Ca₃N₂ | Calcium nitride | I |
| 9 | AlPO₄ | Aluminum phosphate | I |
|10 | P₂O₃ | Diphosphorus trioxide | C |