What is an ionic compound which contains an element with an electron configuration ending with 3p5 (5 is an exponent). What is the charge of this element's ion in the compound and how did it obtain this charge? Please answer in detail on all aspects of the problem if possible because I pretty much can't figure it out.How can I figure this problem out?
3p5 means that the element is in group 17 of the periodic table, and needs one additional electron to obtain a full electron shell.
So when forming an ion, it gains an electron.
This gives it a single negative charge.
So the charge is -1
Yay!
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