Chemistry please?

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What of the listed ions have an electronic environment of noble gases:Ca2+, Zn2+, Rb+, S2-, Mn2+, Fe3+

2007-12-05 05:53:22 · 3 answers · asked by jammal hines 1 in Science & Mathematics ➔ Chemistry

3 answers

Ca has 20 electrons => Ca2+ has 18 electrons ( as Ar)
S has 16 electrons => S2- has 18 electrons ( as Ar)
Rb gas 37 electrons => Rb+ has 36 electrons ( as Kr)

2007-12-05 05:58:30 · answer #1 · answered by Dr.A 7 · 0⤊ 0⤋

Ca++, Rb+, and S=

2007-12-05 13:57:55 · answer #2 · answered by steve_geo1 7 · 0⤊ 0⤋

all of them... look at a periodic table that shows charges.

2007-12-05 14:00:54 · answer #3 · answered by wes 2 · 0⤊ 0⤋