AP Chemistryeasymcq1 pt
What is the formula of the ionic compound formed between magnesium and nitrogen?
A.Mg3N2
B.Mg2N3
C.MgN
D.Mg2N
Explanation
Core Concept
Magnesium, in group 2, loses two electrons to become Mg²⁺, while nitrogen, in group 15, gains three to become N³⁻. Charges must cancel, so three magnesium ions supply +6 and two nitride ions absorb −6. The smallest whole-number ratio follows from charge neutrality rather than simple atom counting.
Correct Answer
AMg3N2
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