1) Sodium has a charge of +1 and chloride has a charge of -1. What is the correct formula for sodium chloride? a) NaCl b) Na2Cl c) NaCl2 d) Na2Cl3 2) Magnesium has a charge of +2 and oxide has a charge of -2. What is the correct formula for magnesium oxide? a) MgO b) Mg₂O c) MgO₂ d) Mg₂O₂ 3) Calcium has a charge of +2 and chloride has a charge of -1. What is the correct formula for calcium chloride? a) CaCl b) CaCl₂ c) Ca₂Cl d) Ca₂Cl₂ 4) Sodium has a charge of +1 and sulfate has a charge of -2. What is the correct formula for sodium sulfate? a) NaSO₄ b) Na₂SO₄ c) NaSO₄₂ d) Na₂(SO₄)₂ 5) Magnesium has a charge of +2 and chloride has a charge of -1. What is the correct formula for magnesium chloride? a) MgCl b) MgCl₂ c) Mg₂Cl d) Mg₂Cl₂

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