Solved Worksheet I - Binary Compounds 1. Al2O3 | Chegg.com - Free Printable

Let's solve this worksheet step by step. This is a binary compounds naming and formula writing exercise. Binary compounds consist of two elements, typically a metal and a nonmetal (ionic) or two nonmetals (covalent). We'll go through each item, determine whether it's ionic or covalent, and then name or write the formula accordingly.

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Part A: Name the compound from the formula

We’ll use standard naming rules:
- Ionic compounds: Name the metal first, then the nonmetal with "-ide" ending.
- Covalent (molecular) compounds: Use prefixes (mono-, di-, tri-, etc.) for both elements.

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1. Al₂O₃
- Aluminum (Al³⁺), Oxygen (O²⁻) → Ionic
- Aluminum oxide

2. SiI₄
- Silicon and Iodine → Covalent
- "Tetraiodide" → Silicon tetraiodide

3. AsF₃
- Arsenic and Fluorine → Covalent
- "Tri" for fluorine → Arsenic trifluoride

4. Cs₃N
- Cesium (Cs⁺), Nitrogen (N³⁻) → Ionic
- Cesium nitride

5. SiO₂
- Silicon and Oxygen → Covalent
- "Di" for oxygen → Silicon dioxide

6. N₂O₅
- Nitrogen and Oxygen → Covalent
- "Penta" for oxygen → Dinitrogen pentoxide

7. LiCl
- Lithium (Li⁺), Chlorine (Cl⁻) → Ionic
- Lithium chloride

8. B₂S₃
- Boron and Sulfur → Covalent
- "Tri" for sulfur → Diboron trisulfide

9. K₂O
- Potassium (K⁺), Oxygen (O²⁻) → Ionic
- Potassium oxide

10. PF₅
- Phosphorus and Fluorine → Covalent
- "Penta" for fluorine → Phosphorus pentafluoride

11. BeO
- Beryllium (Be²⁺), Oxygen (O²⁻) → Ionic
- Beryllium oxide

12. SeCl₂
- Selenium and Chlorine → Covalent
- "Di" for chlorine → Selenium dichloride

13. I₂O₇
- Iodine and Oxygen → Covalent
- "Hepta" for oxygen → DIiodine heptoxide

14. BaI₂
- Barium (Ba²⁺), Iodine (I⁻) → Ionic
- Barium iodide

15. MgS
- Magnesium (Mg²⁺), Sulfur (S²⁻) → Ionic
- Magnesium sulfide

16. Na₃N
- Sodium (Na⁺), Nitrogen (N³⁻) → Ionic
- Sodium nitride

17. OF₂
- Oxygen and Fluorine → Covalent
- "Di" for fluorine → Oxygen difluoride

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Part B: Write the formula from the name

Now reverse the process.

1. Barium sulfide
- Ba²⁺, S²⁻ → BaS

2. Phosphorus triiodide
- P + 3I → PI₃

3. Sulfur trioxide
- S + 3O → SO₃

4. Aluminum selenide
- Al³⁺, Se²⁻ → Need LCM of 3 and 2 = 6 → Al₂Se₃

5. Silicon disulfide
- Si + 2S → SiS₂

6. Carbon dioxide
- C + 2O → CO₂

7. Sodium oxide
- Na⁺, O²⁻ → Na₂O

8. Carbon monoxide
- C + O → CO

9. Lithium fluoride
- Li⁺, F⁻ → LiF

10. Boron trichloride
- B + 3Cl → BCl₃

11. Lithium phosphide
- Li⁺, P³⁻ → Li₃P

12. Diarsenic pentoxide
- 2As + 5O → As₂O₅

13. Aluminum oxide
- Al³⁺, O²⁻ → Al₂O₃

14. Strontium fluoride
- Sr²⁺, F⁻ → SrF₂

15. Potassium sulfide
- K⁺, S²⁻ → K₂S

16. Sodium sulfide
- Na⁺, S²⁻ → Na₂S

17. Cesium telluride
- Cs⁺, Te²⁻ → Cs₂Te

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✔ Final Answers:

#### Left Column (Name the Formula):
1. Aluminum oxide
2. Silicon tetraiodide
3. Arsenic trifluoride
4. Cesium nitride
5. Silicon dioxide
6. Dinitrogen pentoxide
7. Lithium chloride
8. Diboron trisulfide
9. Potassium oxide
10. Phosphorus pentafluoride
11. Beryllium oxide
12. Selenium dichloride
13. DIiodine heptoxide
14. Barium iodide
15. Magnesium sulfide
16. Sodium nitride
17. Oxygen difluoride

#### Right Column (Write Formula):
1. BaS
2. PI₃
3. SO₃
4. Al₂Se₃
5. SiS₂
6. CO₂
7. Na₂O
8. CO
9. LiF
10. BCl₃
11. Li₃P
12. As₂O₅
13. Al₂O₃
14. SrF₂
15. K₂S
16. Na₂S
17. Cs₂Te

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