Question

two elements that have two electron in their outermost shell
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Answer 1

Answer

Elements of group II have two electrons in their outermost shells. So, Magnesium, Calcium, and Strontium are the 3 elements that have two electrons in their outermost orbit.

Explanation:

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Answer 2

Answer:

helium , calcium , magnesium , etc

Explanation:

electronic configuration

helium - 2 (it has 2 in its outermost shell)

calcium - 2,8,8,2= 20

magnesium - 2,8,2= 12

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