Which of the following pairs of elements would be most likely to share similar properties?
A) N and O
B) B and Si
C) Na and Mg
D) Br and Kr
E) He and Ne
Solution: Elements in the same group on the Periodic Table (same column) have similar properties because they have the same number of valence electrons. Both He and Ne are in the same group on the Periodic Table (Group 8).
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