How many valence electrons are there in an atom with the electron configuration [noble gas]ns²(n −1)d¹⁰np³? A)2 B)3 C)5 D)10 E)15

Name: How many valence electrons are there in an atom with the electron configuration [noble gas]ns 2 (n −1)d 10 np 3 ? A)2 B)3 C)5 D)10 E)15
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Quizplus · Accepted Answer

The valence electrons are the electrons in the outermost shell, which in this case are the ns and np electrons. Therefore, there are 2 (from ns) + 3 (from np) = 5 valence electrons.

How Many Valence Electrons Are There in an Atom with the Electron