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Question
Which of the following is INCORRECT for alkali metals?
Options
Li < Na < K < Rb < Cs (Atomic radii)
Li < Na < K < Rb < Cs (Ionic radii)
Li > Na > K > Rb > Cs (Melting point)
Li < Na < K < Rb < Cs (Ionization enthalpy)
MCQ
Solution
Li < Na < K < Rb < Cs (Ionization enthalpy)
Explanation:
Moving down the group, the ionization enthalpy of alkali metals drops. As a result, Li > Na > K > Rb > Cs is the order.
shaalaa.com
Alkali Metals and Alkaline Earth Metals
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