a
their outmost shells contain equal number of electrons
b
their highest occupied enegy level is full
c
they are monatomic gases
d
they are non-metals
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MMukhtar
1 year ago
I think the answer is (B).their highest occupied energy level is full.
Group O elements, also known as noble gases, are unreactive because their outermost electron shells are complete, making them stable and less likely to participate in chemical reactions.
