Free Printable Chemical Bonding Worksheets - Free Printable

Let's solve this Chemical Bonding Worksheet step by step.

We need to:

1. Identify the first and second elements in each compound.
2. Determine whether each element is a metal or non-metal.
3. Based on the types of elements involved, determine if the bond is ionic or covalent.

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🔬 General Rules:

- Ionic bonds form between a metal and a non-metal (electrons are transferred).
- Covalent bonds form between two non-metals (electrons are shared).
- Some metals can form covalent compounds in certain cases (e.g., transition metals with high oxidation states), but for most basic cases, metal + non-metal → ionic.

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Now, let’s go through each compound:

| Compound | 1st Element | 2nd Element | Type of Bond |
|---------|-------------|-------------|--------------|
| HF | H (non-metal) | F (non-metal) | Covalent |
| MgBr₂ | Mg (metal) | Br (non-metal) | Ionic |
| O₂ | O (non-metal) | O (non-metal) | Covalent (diatomic molecule) |
| AlF₃ | Al (metal) | F (non-metal) | Ionic |
| PI₃ | P (non-metal) | I (non-metal) | Covalent |
| CO₂ | C (non-metal) | O (non-metal) | Covalent |
| CaO | Ca (metal) | O (non-metal) | Ionic |
| CuCl₂ | Cu (metal) | Cl (non-metal) | Ionic |
| Rb₂S | Rb (metal) | S (non-metal) | Ionic |
| NBr₃ | N (non-metal) | Br (non-metal) | Covalent |
| NaCl | Na (metal) | Cl (non-metal) | Ionic |
| CCl₄ | C (non-metal) | Cl (non-metal) | Covalent |
| Fe₂O₃ | Fe (metal) | O (non-metal) | Ionic |
| NO₂ | N (non-metal) | O (non-metal) | Covalent |
| K₂O | K (metal) | O (non-metal) | Ionic |

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✔ Final Answer Table:

| Compound | 1st Element | 2nd Element | Type of Bond |
|---------|-------------|-------------|--------------|
| HF | H (non-metal) | F (non-metal) | Covalent |
| MgBr₂ | Mg (metal) | Br (non-metal) | Ionic |
| O₂ | O (non-metal) | O (non-metal) | Covalent |
| AlF₃ | Al (metal) | F (non-metal) | Ionic |
| PI₃ | P (non-metal) | I (non-metal) | Covalent |
| CO₂ | C (non-metal) | O (non-metal) | Covalent |
| CaO | Ca (metal) | O (non-metal) | Ionic |
| CuCl₂ | Cu (metal) | Cl (non-metal) | Ionic |
| Rb₂S | Rb (metal) | S (non-metal) | Ionic |
| NBr₃ | N (non-metal) | Br (non-metal) | Covalent |
| NaCl | Na (metal) | Cl (non-metal) | Ionic |
| CCl₄ | C (non-metal) | Cl (non-metal) | Covalent |
| Fe₂O₃ | Fe (metal) | O (non-metal) | Ionic |
| NO₂ | N (non-metal) | O (non-metal) | Covalent |
| K₂O | K (metal) | O (non-metal) | Ionic |

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🧠 Explanation Summary:

- Metals: Typically found on the left side of the periodic table (Groups 1–13, except hydrogen). Examples: Na, K, Ca, Mg, Al, Fe, Cu, Rb.
- Non-metals: Found on the right side (Groups 14–18). Examples: H, C, N, O, F, P, S, Cl, Br, I.
- Ionic Bonds: Occur when a metal transfers electrons to a non-metal (e.g., NaCl).
- Covalent Bonds: Occur when two non-metals share electrons (e.g., CO₂).

> ⚠️ Note: Although aluminum (Al) is a metal, it sometimes shows covalent character due to its high charge density, but AlF₃ is generally considered ionic because of the large electronegativity difference. Similarly, CuCl₂ is ionic despite copper being a transition metal.

This worksheet helps reinforce how elemental classification predicts bonding type!