Answered

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Helium is located in group 8A but does not have eight valence electrons. Why is it located in 8A, not 2A?

Sagot :

Answer:

its outermost shell is completely full making it extremely stable.

Explanation:

It only has two electrons in its outer shell so its valence electron configuration is 1s2. Even though it only has two electrons, it is grouped with elements that have eight valence electrons. Helium is still happy because its outermost shell is completely full making it extremely stable.

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