Chemistry, 24.05.2021 21:40, aloading2256

Based on the placement on the Periodic Table, what set of elements have the same number of electron shells?
A Hydrogen (H), Helium (He), and Lithium (Li)
B Carbon (C), Nitrogen (N), and Oxygen (O)
C Titanium (Ti), Zirconium (Zr), and Hafnium (Hf)
D Boron (B), Silicon (Si), and Arsenic (As)

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Based on the placement on the Periodic Table, what set of elements have the same number of electron...