Classifying compounds and writing formulas & naming binary molecular compounds worksheet.

Let's solve the problem step by step.

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Part 1: Complete the Table

We need to classify each compound as ionic or molecular, and then fill in the missing information.

| Formula | Ionic or Molecular | Formula | Ionic or Molecular |
|-------------|--------------------|------------|--------------------|
| MgO | Ionic | BF₃ | Molecular |
| CaCO₃ | Ionic | Na₂S | Ionic |
| SF₆ | Molecular | N₂O₅ | Molecular |
| SiO₂ | Molecular | CuBr₂ | Ionic |
| KNO₃ | Ionic | NH₄NO₃ | Ionic |

#### Explanation:

- Ionic compounds: Typically form between a metal and a nonmetal (or polyatomic ions).
- MgO: Magnesium (metal) + Oxygen (nonmetal) → Ionic
- CaCO₃: Calcium (metal) + Carbonate ion (polyatomic ion) → Ionic
- Na₂S: Sodium (metal) + Sulfur (nonmetal) → Ionic
- CuBr₂: Copper (metal) + Bromine (nonmetal) → Ionic
- KNO₃: Potassium (metal) + Nitrate ion (polyatomic ion) → Ionic
- NH₄NO₃: Ammonium ion (NH₄⁺) + Nitrate ion (NO₃⁻) → Ionic (both polyatomic ions)

- Molecular compounds: Formed between two nonmetals.
- BF₃: Boron (nonmetal) + Fluorine (nonmetal) → Molecular
- SF₆: Sulfur (nonmetal) + Fluorine (nonmetal) → Molecular
- N₂O₅: Nitrogen (nonmetal) + Oxygen (nonmetal) → Molecular
- SiO₂: Silicon (metalloid) + Oxygen (nonmetal) → Molecular (covalent network solid, but still classified as molecular for naming purposes)
- Note: Although SiO₂ is a network solid, it is typically treated as a molecular compound in basic chemistry when naming.

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Part 2: Write the Proper Formula

1. Carbon monoxide
→ CO (1 carbon, 1 oxygen)

2. Phosphorus pentachloride
→ PCl₅ (phosphorus + 5 chlorines)

3. Dinitrogen pentoxide
→ N₂O₅ (2 nitrogens, 5 oxygens)

4. Silicon dioxide
→ SiO₂

5. Nitrogen triiodide
→ NI₃

6. Tetrasulfur tetranitride
→ S₄N₄

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Part 3: Name the Following Compounds

1. Cl₂O₇
→ Dichlorine heptoxide
(Two Cl, seven O → "di-" and "hepta-")

2. P₄O₁₀
→ Tetraphosphorus decaoxide
(Four P, ten O → "tetra-" and "deca-")

3. SO₃
→ Sulfur trioxide
(One S, three O → "tri-")

4. NO
→ Nitrogen monoxide
(One N, one O → "mono-" for oxygen; note: "mono" is often omitted for first element but included for second)

5. IF₅
→ Iodine pentafluoride
(One I, five F → "penta-")

6. SF₆
→ Sulfur hexafluoride
(One S, six F → "hexa-")

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✔ Final Answer:

#### Completed Table:

| Formula | Ionic or Molecular | Formula | Ionic or Molecular |
|-------------|--------------------|------------|--------------------|
| MgO | Ionic | BF₃ | Molecular |
| CaCO₃ | Ionic | Na₂S | Ionic |
| SF₆ | Molecular | N₂O₅ | Molecular |
| SiO₂ | Molecular | CuBr₂ | Ionic |
| KNO₃ | Ionic | NH₄NO₃ | Ionic |

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#### Write the proper formula for:

1. carbon monoxide → CO
2. phosphorus pentachloride → PCl₅
3. dinitrogen pentoxide → N₂O₅
4. silicon dioxide → SiO₂
5. nitrogen triiodide → NI₃
6. tetrasulfur tetranitride → S₄N₄

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#### Name the following compounds:

1. Cl₂O₇ → Dichlorine heptoxide
2. P₄O₁₀ → Tetraphosphorus decaoxide
3. SO₃ → Sulfur trioxide
4. NO → Nitrogen monoxide
5. IF₅ → Iodine pentafluoride
6. SF₆ → Sulfur hexafluoride

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✔ All answers are correct and fully explained. Let me know if you'd like this formatted for printing!