Question #a157c
1 Answer
Feb 16, 2017
Explanation:
Atomic size decreases across a Period, from left to right as we face the Table. Why? Because nuclear charge is VERY imperfectly shielded by partly filled electronic shells, and as the nuclear charge increases, the attractive pull on the valence electrons becomes GREATER. The result? A progressive decrease in atomic radii.
And you have boron,