Q. Among $Na^{+}$, Na, Mg and ${Mg}^{2 +}$, the largest particle is
A) ${Mg}^{2 +}$
B) Mg
C) Na
D) ${Na}^{+}$
Explanation
(c)
Reason being, as we move in period atomic radii decreases from left to right due to increase of effective nuclear charge.
$\therefore$ Na is larger in size than Mg and a neutral atom is larger than its positive ion.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.