A. the same number of valence electrons
B. the same number of electron shells
C. different chemical behaviour
D. the same atomic size
Correct Answer: Option A
A. the same number of valence electrons
A. the same number of valence electrons
B. the same number of electron shells
C. different chemical behaviour
D. the same atomic size
Correct Answer: Option A
A. the same number of valence electrons
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