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Classification of Matter A.1 Periodic Table Elements Classification (id: 15811bd

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admin 发表于 2024-2-7 04:10:23 | 显示全部楼层 |阅读模式
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 the correct formula for1v0mybh dy o1t)xvt.gl 10j2 d.n1tpi stronti7grmdkt) )r:4quc:hkeiskz l- .q(5y um sulfide?

A. $Sr_2​S_2​$
B. $Sr​S_2​$
C. $Sr​S$
D. $Sr_2​S​$


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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