本题目来源于试卷: Classification of Matter A.1 Periodic Table Elements Classification，类别为 IB化学
[单选题]
Which of the following is t:d8 j.itx3dnc v0m p5qhe cor g t59k9/ udun)z ;r w0yak7dif/h.jwzmoqk+4rect formula for strontium sulfide?
A. $Sr_2S_2$
B. $SrS_2$
C. $SrS$
D. $Sr_2S$
参考答案: C
本题详细解析:
Explanation: Strontium is in group 2 and so forms $Sr^{2+}$ ions. The formula of the sulfide ion is $S^{2−}$ as sulfur is in group 16. For the positive and negative charges to cancel out, one of each ion is required.
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