Question

Which one of the following noble gases is least polarizable?

• A. $Xe$
• B. $Ar$
• C. $Ne$
• D. $He$
• E. All have equal polarizablilty

Answer 1

The correct option is D $He$

$He$ is least polarizable. Among noble gases, $He$ has smallest size. lower is the size, more strongly are the valence electrons held with nucleus and lower is the polarizability.