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Title: polyatomic ion that has one fewer electron than the sum of its valence electrons? Post by: tony365 on Feb 15, 2013 A question in my chemistry homework says:
Give the charge (ex. 2+, 3-) of a polyatomic ion that has one fewer electron than the sum of its valence electrons. Give the charge of a polyatomic ion that has two more electrons that the sum of its valence electrons. I don't even know where to begin. The questions just confuse me. Can anyone please help? Title: polyatomic ion that has one fewer electron than the sum of its valence electrons? Post by: SmokeyV4L on Feb 15, 2013 (NH4)+ and (SO4)2- are examples.
Title: polyatomic ion that has one fewer electron than the sum of its valence electrons? Post by: ilikescience on Feb 15, 2013 (NH4)+ and (SO4)2-
If it has one fewer charge than the sum of its valence electrons then (NH4)+ becomes (NH4) and (SO4)2- becomes (SO4)3- Im Sure... And If it has two more electrons that the sum of its valence electrons then (NH4)+ becomes (NH4)- and (SO4)2- becomes (SO4)4- Title: polyatomic ion that has one fewer electron than the sum of its valence electrons? Post by: rixa85 on Feb 15, 2013 The reason is NH4 would have 5 + 4 valence electrons and would be neutral, but if we remove (one fewer electron than the sum of its valence electrons) one electron we are left with a + For SO4, we would have 6 + 24 valence electrons and no charge, but if we add (two more electrons that the sum of its valence electrons) two electrons, we get a 2- charge.
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