Which of the following sets of ions are isoelectronic? Check all that apply. Check all that apply. (Li+,Be2+,H−) (O2−,S2...

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Which of the following sets of ions are isoelectronic? Check all that apply. Check all that apply. (Li+,Be2+,H−) (O2−,S2...

Which of the following sets of ions are isoelectronic? Check all that apply. Check all that apply. (Li+,Be2+,H−) (O2−,S2−,Se2−)( Na+,Mg2+,Al3+)

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Answer 1

Answer #1

Set 1:

Number of electron in Li = 3

So, Li+ has 2 electrons

Number of electron in Be = 4

So, Be2+ has 2 electrons

Number of electron in H = 1

So, H- has 2 electrons

Set 1 is isoelectronic

Set 2:

Number of electron in O = 8

So, O2- has 10 electrons

Number of electron in S = 16

So, S2- has 18 electrons

Number of electron in Se = 34

So, Se2- has 36 electrons

Set 2 is not isoelectronic

Set 3:

Number of electron in Na = 11

So, Na+ has 10 electrons

Number of electron in Mg = 12

So, Mg2+ has 10 electrons

Number of electron in Al = 13

So, Al3+ has 10 electrons

Set 3 is isoelectronic

Answer: set 1 and 3

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Answer 2

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