Free Printable Ionic and Covalent Bonds Worksheets - Free Printable

Let’s go through each compound one by one and figure out whether it has an ionic or covalent bond.

Quick reminder (for you, not to be shown in final answer):

- Ionic bonds happen between a metal and a nonmetal. The metal gives electrons to the nonmetal.
- Covalent bonds happen between two nonmetals. They share electrons.
- If both atoms are the same element (like O₂ or H₂), it’s always covalent.
- Some compounds have polyatomic ions (like SO₄²⁻ in BaSO₄) — if there’s a metal + polyatomic ion, it’s still ionic.

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Now let’s analyze each:

1. BaO → Barium (metal) + Oxygen (nonmetal) → Ionic
2. Na₂O → Sodium (metal) + Oxygen (nonmetal) → Ionic
3. NI₃ → Nitrogen (nonmetal) + Iodine (nonmetal) → Covalent
4. CBr₄ → Carbon (nonmetal) + Bromine (nonmetal) → Covalent
5. CaCl₂ → Calcium (metal) + Chlorine (nonmetal) → Ionic
6. H₂O → Hydrogen (nonmetal) + Oxygen (nonmetal) → Covalent
7. Al₂O₃ → Aluminum (metal) + Oxygen (nonmetal) → Ionic
8. Mg₃P₂ → Magnesium (metal) + Phosphorus (nonmetal) → Ionic
9. O₂ → Two oxygen atoms (same nonmetal) → Covalent
10. NaCl → Sodium (metal) + Chlorine (nonmetal) → Ionic
11. SO₂ → Sulfur (nonmetal) + Oxygen (nonmetal) → Covalent
12. FeCl₂ → Iron (metal) + Chlorine (nonmetal) → Ionic
13. H₂ → Two hydrogen atoms (same nonmetal) → Covalent
14. PI₃ → Phosphorus (nonmetal) + Iodine (nonmetal) → Covalent
15. BaSO₄ → Barium (metal) + sulfate ion (polyatomic ion) → Ionic (because Ba is metal, even though SO₄ has covalent bonds inside, the overall compound is ionic)
16. KI → Potassium (metal) + Iodine (nonmetal) → Ionic
17. CH₄ → Carbon (nonmetal) + Hydrogen (nonmetal) → Covalent
18. LiBr → Lithium (metal) + Bromine (nonmetal) → Ionic

✔ All checked! No mistakes found.

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Final Answer:
| Compounds | Type of Bond |
|-----------|--------------|
| BaO | Ionic |
| Na₂O | Ionic |
| NI₃ | Covalent |
| CBr₄ | Covalent |
| CaCl₂ | Ionic |
| H₂O | Covalent |
| Al₂O₃ | Ionic |
| Mg₃P₂ | Ionic |
| O₂ | Covalent |
| NaCl | Ionic |
| SO₂ | Covalent |
| FeCl₂ | Ionic |
| H₂ | Covalent |
| PI₃ | Covalent |
| BaSO₄ | Ionic |
| KI | Ionic |
| CH₄ | Covalent |
| LiBr | Ionic |