Choose the alkali metal with highest reactivity among the following

Choose the alkali metal with highest reactivity among the following
  1. Cs
  2. Li
  3. \(\mathrm{Na}\)
  4. \(\mathrm{Rb}\)

Solution

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.

Asked in: AP EAMCET 2020 (18 Sep Shift 2)

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