Final answer:
When a magnesium ion is attracted to a chlorine ion, they form an ionic compound by exchanging electrons.
Explanation:
When a magnesium ion is attracted to a chlorine ion, they form an ionic compound. In this process, magnesium loses two electrons to become Mg^2+, and chlorine gains one electron to become Cl^-. The attraction between the positively charged magnesium ion and negatively charged chlorine ion results in the formation of magnesium chloride.
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