Question

Among the alkali metals, the increasing order of ease of formation of cations is:

• A. Cs < Rb < K < Na < Li
• B. Li > Na > K > Rb > Cs
• C. Li < Na < K < Rb < Cs
• D. Cs > Rb > K > Na > Li

Answer 1

Answer: (C)

Li < Na < K < Rb < Cs

The ease of forming cation increases with decreasing IE. The IE decreases down the group . Thus correct order is $Li<Na<K<Rb<Cs$