AP EAMCET · Chemistry · s Block Elements
Choose the alkali metal with highest reactivity among the following
- A Cs
- B Li
- C \(\mathrm{Na}\)
- D \(\mathrm{Rb}\)
Answer & Solution
Correct Answer
(A) Cs
Step-by-step Solution
Detailed explanation
Among alkali metals (group-1), Cs is most reactive because of its lowest ionisation energy (1E, or \(\Delta_i H_1\)) Note \(\mathrm{Fr}\) is not considered as it is radioactive.
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