Worksheet naming ionic compounds | PDF - Free Printable

Let’s go step by step to fill in the chart. We need to find:

1. The positive ion (cation) — usually the metal or positive part.
2. The negative ion (anion) — usually the nonmetal or negative part.
3. The name and formula of the compound — combine the ions so the total charge is zero.

We’ll use common charges for elements and remember Roman numerals tell us the charge of metals that can have more than one (like tin, copper, lead, chromium, iron).

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1. calcium and nitrogen

- Calcium (Ca) → always +2
- Nitrogen (N) → forms nitride ion, N³⁻
- To balance: Ca₃N₂ (because 3×(+2) = +6, 2×(-3) = -6)
- Name: Calcium nitride

2. tin (IV) and chlorine

- Tin(IV) → Sn⁴⁺
- Chlorine → Cl⁻
- Need 4 Cl⁻ to balance Sn⁴⁺ → SnCl₄
- Name: Tin(IV) chloride

3. copper (II) and bromine

- Copper(II) → Cu²⁺
- Bromine → Br⁻
- Need 2 Br⁻ → CuBr₂
- Name: Copper(II) bromide

4. barium and Fluoride

- Barium → Ba²⁺
- Fluoride → F⁻
- Need 2 F⁻ → BaF₂
- Name: Barium fluoride

5. tin (II) and sulfur

- Tin(II) → Sn²⁺
- Sulfur → S²⁻
- Charges cancel → SnS
- Name: Tin(II) sulfide

6. Aluminum and Oxygen

- Aluminum → Al³⁺
- Oxygen → O²⁻
- LCM of 3 and 2 is 6 → Al₂O₃
- Name: Aluminum oxide

7. Lithium and phosphorus

- Lithium → Li⁺
- Phosphorus → P³⁻ (phosphide)
- Need 3 Li⁺ → Li₃P
- Name: Lithium phosphide

8. Sodium and Iodine

- Sodium → Na⁺
- Iodine → I⁻
- Combine 1:1 → NaI
- Name: Sodium iodide

9. Lead (II) and Phosphorous

- Lead(II) → Pb²⁺
- Phosphorus → P³⁻
- LCM of 2 and 3 is 6 → Pb₃P₂
- Name: Lead(II) phosphide

10. magnesium and hydrogen

- Magnesium → Mg²⁺
- Hydrogen → H⁻ (hydride ion — yes, it exists!)
- Need 2 H⁻ → MgH₂
- Name: Magnesium hydride

11. silver and sulfur

- Silver → Ag⁺ (always +1)
- Sulfur → S²⁻
- Need 2 Ag⁺ → Ag₂S
- Name: Silver sulfide

12. barium and nitrogen

- Barium → Ba²⁺
- Nitrogen → N³⁻
- LCM of 2 and 3 is 6 → Ba₃N₂
- Name: Barium nitride

13. fluorine and manganese (II)

- Manganese(II) → Mn²⁺
- Fluorine → F⁻
- Need 2 F⁻ → MnF₂
- Name: Manganese(II) fluoride

14. Chromium (III) and nitrogen

- Chromium(III) → Cr³⁺
- Nitrogen → N³⁻
- Charges cancel → CrN
- Name: Chromium(III) nitride

15. Sulfur and Iron (III)

- Iron(III) → Fe³⁺
- Sulfur → S²⁻
- LCM of 3 and 2 is 6 → Fe₂S₃
- Name: Iron(III) sulfide

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Final Answer:

| Compound made of | Positive ion | Negative ion | Name and Formula of the compound |
|------------------------------|--------------|--------------|------------------------------------------|
| 1. calcium and nitrogen | Ca²⁺ | N³⁻ | Calcium nitride, Ca₃N₂ |
| 2. tin (IV) and chlorine | Sn⁴⁺ | Cl⁻ | Tin(IV) chloride, SnCl₄ |
| 3. copper (II) and bromine | Cu²⁺ | Br⁻ | Copper(II) bromide, CuBr₂ |
| 4. barium and Fluoride | Ba²⁺ | F⁻ | Barium fluoride, BaF₂ |
| 5. tin (II) and sulfur | Sn²⁺ | S²⁻ | Tin(II) sulfide, SnS |
| 6. Aluminum and Oxygen | Al³⁺ | O²⁻ | Aluminum oxide, Al₂O₃ |
| 7. Lithium and phosphorus | Li⁺ | P³⁻ | Lithium phosphide, Li₃P |
| 8. Sodium and Iodine | Na⁺ | I⁻ | Sodium iodide, NaI |
| 9. Lead (II) and Phosphorous | Pb²⁺ | P³⁻ | Lead(II) phosphide, Pb₃P₂ |
| 10. magnesium and hydrogen | Mg²⁺ | H⁻ | Magnesium hydride, MgH₂ |
| 11. silver and sulfur | Ag⁺ | S²⁻ | Silver sulfide, Ag₂S |
| 12. barium and nitrogen | Ba²⁺ | N³⁻ | Barium nitride, Ba₃N₂ |
| 13. fluorine and manganese (II)| Mn²⁺ | F⁻ | Manganese(II) fluoride, MnF₂ |
| 14. Chromium (III) and nitrogen| Cr³⁺ | N³⁻ | Chromium(III) nitride, CrN |
| 15. Sulfur and Iron (III) | Fe³⁺ | S²⁻ | Iron(III) sulfide, Fe₂S₃ |