How many core electrons does a chlorine atom have
A) 17
B) 7
C) 10
D) 18
E) 8

Question

Quizplus · Accepted Answer

The core electrons of the chlorine atom are the electrons in the inner shells, which are not involved in chemical reactions. Chlorine has 17 electrons, but the first two electrons fill the innermost shell, leaving 8 electrons in the second shell and 7 valence electrons in the outermost shell. Therefore, the number of core electrons in chlorine is 10 (17 total electrons - 7 valence electrons = 10 core electrons).

How Many Core Electrons Does a Chlorine Atom Have