If an element has an atomic number of 12, how many electrons are in its its outermost shell?

1 Answer
Jumbotron · Truong-Son N.
Jul 25, 2017

2 Electrons

Explanation:

Shells #-># K L M N O....

K can only contain #2#
while L, M N can only contain #8, 18#, and #32#, respectively.

The atomic number of 12 is Magnesium has the following number of electrons in their respective shell #2, 8, color(red)2#..

Where 2 is the electron in the outermost shell..

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