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Question 1 An atom of magnesium and two atoms of chlorine react and yield the compound of magnesium chloride. Which option represents this scenario as a chemical equation? 2Cl → → Mg + MgCl2 2Cl right arrow Mg + MgCl2 Mg + 2Cl → → MgCl2 Mg + 2Cl right arrow MgCl2 MgCl2 → → Mg + Mg + Cl MgCl2 right arrow Mg + Mg + Cl Mg → → 2Cl + MgCl2 Mg right arrow 2Cl + MgCl2 MgCl2 → → Mg + 2Cl

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Answer:

Mg + 2Cl ----> MgCl2

Explanation:

In writing a chemical reaction equation, it is a rule that the number of atoms of each element on the right hand side must be equal to the number of atoms of each element on the left hand side.

If this condition is fulfilled, the reaction equation is said to be balanced.

In this case, there are two chlorine atoms and one magnesium atom on both sides of the reaction equation hence the equation is balanced.

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