Q. Order of increasing density is
A) $Li < K < Na < Rb < Cs$
B) $Li < Na < K < Rb < Cs$
C) $Cs < Rb < K < Na < Li$
D) $K < Li < Na < Rb < Cs$
Explanation
(a)
The density of alkali metal is as :
Element : Li Na K Rb Cs
Density : 0.53 0.97 0.68 1.53 1.90
Hence, the order of increasing density is as
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Li < K < Na < Rb < Cs$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.