Mg(OH)2
The correct answer is Mg(OH)2.
Magnesium (Mg) is an alkaline earth metal with a +2 charge (Mg2+). Hydroxide (OH) is a polyatomic ion with a -1 charge (OH-). To form a neutral compound, the charges must balance. Therefore, we need two hydroxide ions to balance the +2 charge of the magnesium ion.
Let's analyze the incorrect options:
- Mg2(OH): This formula implies two magnesium ions and one hydroxide ion. The charges do not balance.
- MgOH2: This formula implies one magnesium ion and two hydroxide ions, but the arrangement incorrectly suggests a divalent hydroxide, which is incorrect.
- Mg(OH): This formula implies one magnesium ion and one hydroxide ion; the charges don't balance.
Only Mg(OH)2 correctly represents the balanced charges, resulting in a neutral compound.
Understanding ionic charges and balancing them is crucial in correctly writing chemical formulas. This ensures the overall neutrality of the ionic compound. Therefore, the correct representation of Magnesium Hydroxide is Mg(OH)2.
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