Chemistry worksheet for practicing naming and writing formulas of ionic compounds.

Problem Analysis:

The task consists of two parts:
1. Matching chemical names with their correct formulas.
2. Naming chemical compounds based on their formulas.

Let's solve each part step by step.

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Part 1: Join the names with the correct formula

We need to match each chemical name with its corresponding formula. To do this, we will use our knowledge of chemical nomenclature and the rules for writing chemical formulas.

#### Chemical Names and Formulas:
1. Magnesium fluoride:
- Magnesium (Mg) has a +2 charge.
- Fluorine (F) has a -1 charge.
- Formula: MgF₂
- Match: MgF₂

2. Aluminium sulfide:
- Aluminium (Al) has a +3 charge.
- Sulfur (S) has a -2 charge.
- Formula: Al₂S₃ (to balance charges)
- Match: Al₂S₃

3. Calcium oxide:
- Calcium (Ca) has a +2 charge.
- Oxygen (O) has a -2 charge.
- Formula: CaO
- Match: CaO

4. Ammonium phosphate:
- Ammonium (NH₄⁺) has a +1 charge.
- Phosphate (PO₄³⁻) has a -3 charge.
- Formula: (NH₄)₃PO₄ (to balance charges)
- Match: (NH₄)₃PO₄

5. Francium sulfide:
- Francium (Fr) has a +1 charge.
- Sulfur (S) has a -2 charge.
- Formula: Fr₂S (to balance charges)
- Match: Fr₂S

6. Potassium nitrate:
- Potassium (K) has a +1 charge.
- Nitrate (NO₃⁻) has a -1 charge.
- Formula: KNO₃
- Match: KNO₃

7. Ammonium phosphite:
- Ammonium (NH₄⁺) has a +1 charge.
- Phosphite (PO₃³⁻) has a -3 charge.
- Formula: (NH₄)₃P
- Match: (NH₄)₃P

8. Aluminium sulfite:
- Aluminium (Al) has a +3 charge.
- Sulfite (SO₃²⁻) has a -2 charge.
- Formula: Al₂(SO₃)₃ (to balance charges)
- Match: Al₂(SO₃)₃

#### Final Matches:
- Magnesium fluoride → MgF₂
- Aluminium sulfide → Al₂S₃
- Calcium oxide → CaO
- Ammonium phosphate → (NH₄)₃PO₄
- Francium sulfide → Fr₂S
- Potassium nitrate → KNO₃
- Ammonium phosphite → (NH₄)₃P
- Aluminium sulfite → Al₂(SO₃)₃

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Part 2: Write the correct name

We need to name the chemical compounds based on their given formulas. We will use the rules of chemical nomenclature to determine the names.

#### Chemical Formulas and Names:
1. BaCl₂:
- Barium (Ba) is a metal with a +2 charge.
- Chloride (Cl⁻) is a nonmetal with a -1 charge.
- Name: Barium chloride

2. NaNO₃:
- Sodium (Na) is a metal with a +1 charge.
- Nitrate (NO₃⁻) is a polyatomic ion with a -1 charge.
- Name: Sodium nitrate

3. NH₄ClO₃:
- Ammonium (NH₄⁺) is a cation with a +1 charge.
- Chlorate (ClO₃⁻) is a polyatomic ion with a -1 charge.
- Name: Ammonium chlorate

4. Ca(ClO)₂:
- Calcium (Ca) is a metal with a +2 charge.
- Hypochlorite (ClO⁻) is a polyatomic ion with a -1 charge.
- Since there are 2 hypochlorite ions, the name indicates the number using the prefix "di-".
- Name: Calcium hypochlorite

5. Mg(NO₃)₂:
- Magnesium (Mg) is a metal with a +2 charge.
- Nitrate (NO₃⁻) is a polyatomic ion with a -1 charge.
- Name: Magnesium nitrate

6. NH₄Br:
- Ammonium (NH₄⁺) is a cation with a +1 charge.
- Bromide (Br⁻) is a nonmetal with a -1 charge.
- Name: Ammonium bromide

7. LiCl:
- Lithium (Li) is a metal with a +1 charge.
- Chloride (Cl⁻) is a nonmetal with a -1 charge.
- Name: Lithium chloride

#### Final Names:
- BaCl₂ → Barium chloride
- NaNO₃ → Sodium nitrate
- NH₄ClO₃ → Ammonium chlorate
- Ca(ClO)₂ → Calcium hypochlorite
- Mg(NO₃)₂ → Magnesium nitrate
- NH₄Br → Ammonium bromide
- LiCl → Lithium chloride

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Final Answer:

#### Part 1:
- Magnesium fluoride → MgF₂
- Aluminium sulfide → Al₂S₃
- Calcium oxide → CaO
- Ammonium phosphate → (NH₄)₃PO₄
- Francium sulfide → Fr₂S
- Potassium nitrate → KNO₃
- Ammonium phosphite → (NH₄)₃P
- Aluminium sulfite → Al₂(SO₃)₃

#### Part 2:
- BaCl₂ → Barium chloride
- NaNO₃ → Sodium nitrate
- NH₄ClO₃ → Ammonium chlorate
- Ca(ClO)₂ → Calcium hypochlorite
- Mg(NO₃)₂ → Magnesium nitrate
- NH₄Br → Ammonium bromide
- LiCl → Lithium chloride

Boxed Final Answer:
\[
\boxed{
\begin{array}{ll}
\text{Part 1:} & \\
\text{Magnesium fluoride} & \text{MgF₂} \\
\text{Aluminium sulfide} & \text{Al₂S₃} \\
\text{Calcium oxide} & \text{CaO} \\
\text{Ammonium phosphate} & \text{(NH₄)₃PO₄} \\
\text{Francium sulfide} & \text{Fr₂S} \\
\text{Potassium nitrate} & \text{KNO₃} \\
\text{Ammonium phosphite} & \text{(NH₄)₃P} \\
\text{Aluminium sulfite} & \text{Al₂(SO₃)₃} \\
\\
\text{Part 2:} & \\
\text{BaCl₂} & \text{Barium chloride} \\
\text{NaNO₃} & \text{Sodium nitrate} \\
\text{NH₄ClO₃} & \text{Ammonium chlorate} \\
\text{Ca(ClO)₂} & \text{Calcium hypochlorite} \\
\text{Mg(NO₃)₂} & \text{Magnesium nitrate} \\
\text{NH₄Br} & \text{Ammonium bromide} \\
\text{LiCl} & \text{Lithium chloride} \\
\end{array}
}
\]