Question
Question: Increasing order of density is –...
Increasing order of density is –
A
Li < K < Na <Rb< Cs
B
Li < Na < K <Rb< Cs
C
Li < Na < K < Cs <Rb
D
K < Li <Na< Rb < Cs
Answer
Li < K < Na <Rb< Cs
Explanation
Solution
As per Lother Meyer's curve the atomic volume of Cs is
maximum among s-block elements. But atomic masses
increases more rapidly than atomic volume, hence density
increases along the group