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General Chemistry

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Electronic Structure

Question
7 out of 10
 

Which of the following is NOT isoelectronic with any of the noble gases?

A Ca2+
B Br
C
D Mg+
Ans. D The question asks us to pick the species that is not isoelectronic (same number of electrons) with the noble gases. In order to solve this problem, you have to find the number of electrons present in them, and if it matches with the number of electrons in any of the noble gases, you can eliminate that choice. All the ions match with one or the other noble gas in terms of the number of electrons, except Mg+.

Electronic Structure Flashcard List

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