Question #a157c

1 Answer
anor277
Feb 16, 2017

#"Atomic size decreases across a Period............"#

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.

ck12.org

And you have boron, #Z=5#, versus oxygen, #Z=8#. The atomic radius of boron is #85xx10^-12*m#; that of oxygen is #60xx10^-12*m#. Are these data consistent with the above spray?

Related questions
See all questions in Periodic Trends in Atomic Size
Impact of this question
2176 views around the world
You can reuse this answer
Creative Commons License