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OpenStudy (anonymous):
Why He (helium) is placed in VIII A Group? it should be placed in II A group because in has two valance electrons..
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OpenStudy (vincent-lyon.fr):
Helium has a full outer shell of 2/2 electrons. Mg and Ca can accomodate 8 electrons in their outer shell, which means theirs in not full at all with 2/8 electrons only.
OpenStudy (anonymous):
thnx :)
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