How many electrons are core electrons?
A) 12
B) 10
C) 8
D) 4
E) 2

Name: How many electrons are core electrons? A) 12 B) 10 C) 8 D) 4 E) 2
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Question

How many electrons are core electrons? 
A) 12 
B) 10 
C) 8 
D) 4 
E) 2

Quizplus · Accepted Answer

Core electrons are those that are not involved in chemical reactions and are closest to the nucleus. In this case, the element has 12 electrons total, and since the atomic number is 12, we know that there are 12 protons in the nucleus. This means that there are 10 electrons that are not valence electrons and are therefore considered core electrons.

How Many Electrons Are Core Electrons