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  • Why does H^+ ion always get associated with other atoms or molecules? (i) Ionisation enthalpy of Hydrogen resembles that of alkali metals.

Why does H^+ ion always get associated with other atoms or molecules?
(i) Ionisation enthalpy of Hydrogen resembles that of alkali metals.
(ii) Its reactivity is similar to halogens.
(iii) It resembles both alkali metals and halogens.
(iv) Loss of an electron from hydrogen atom results in a nucleus of very small size as compared to other atoms or ions. Due to the small size, it cannot exist free.

Answers (1)

The answer is the option (iv) Loss of an electron from hydrogen atom results in a nucleus of very small size as compared to other atoms or ions. Due to the small size, it cannot exist freely.

 A positive hydrogen ion is extremely small in size and cannot exist as a single alone atom but instead only exists as an association with other elements.

 

H \rightarrow H^{+} + e^{-}

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