객관식
Which of the following is the correct chemical formula for strontium chloride?
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3. Chemical Reactions
Writing Ionic Compounds
객관식
Which of the following is the correct formula for the ionic compound formed between strontium ions and nitrogen ions?
A
SrN2
B
SrN
C
Sr3N2
D
Sr2N3
검증된 단계별 안내1
Identify the charges of the ions involved: Strontium (Sr) typically forms a +2 charge as Sr^{2+}, and nitrogen (N) typically forms a -3 charge as N^{3-}.
Determine the ratio of ions needed to balance the total positive and negative charges so that the compound is electrically neutral.
Set up the charge balance equation: Let the number of Sr^{2+} ions be x and the number of N^{3-} ions be y. The total positive charge is 2x and the total negative charge is -3y. For neutrality, 2x = 3y.
Find the smallest whole number ratio of x to y that satisfies 2x = 3y. This ratio is x = 3 and y = 2, meaning 3 Sr^{2+} ions combine with 2 N^{3-} ions.
Write the formula using the ratio found: Sr_{3}N_{2}.
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