Multiple Choice
Which pair of atoms will most likely form an ionic compound?
1
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3. Chemical Reactions
Naming Ionic Compounds
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Which of the following is the correct chemical formula for manganese(III) oxide?
A
Mn3O4
B
MnO
C
MnO2
D
Mn2O3
Verified step by step guidance1
Step 1: Identify the oxidation state of manganese in manganese(III) oxide. The Roman numeral III indicates that manganese has a +3 charge (Mn^{3+}).
Step 2: Recognize that oxide ions have a charge of -2 (O^{2-}).
Step 3: To write the correct formula, balance the total positive and negative charges so the compound is electrically neutral.
Step 4: Set up the charge balance equation: if there are x manganese ions (each +3) and y oxide ions (each -2), then 3x = 2y to balance charges.
Step 5: Find the smallest whole number ratio that satisfies 3x = 2y, which is x = 2 and y = 3, leading to the formula Mn_{2}O_{3}.
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