Notes
Dissimilarities with Alkali Metals…
Hydrogen and alkali metals have some points of dissimilarities:
(i) Unlike alkali metals, hydrogen shows non-metallic character under ordinary conditions.
(ii) Hydrogen exists as diatomic molecule whereas all the alkali metals are monoatomic.
(iii) Size of H1 ion is much smaller than cations of alkali metals.
(iv) Hydrogen has very high ionisation energy in comparison to alkali metals.
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