Compare hydrogen with the alkali metals on the basis of: ion formation.

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Solution

Hydrogen shows electropositive nature like alkali metals due to similar electronic configuration.

Alkali metals Hydrogen

Alkali metals (Li, Na etc.) have one electron in the valence shell and they donate one electron to attain inert gas electron configuration.

Similarly, hydrogen has one electron in the valence shell and hydrogen donate one electron to attain stable configuration.

They form monovalent cations.

Forms monovalent H+ cation.

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Question 2

Why does $H^{+}$ ion always get associated with other atom or molecules?

(a) Ionisation enthalpy of hydrogen resembles that of alkali metals.

(b) Its reactivity is similar to halogens

(d) Loss of an electron from hydrogen atom results in a nucleus of very small size as compare to other or ions. Due to small size it cannot exist free.

Compare the properties of a typical metal and a non-metal on the basis of the following.

Electronic configuration :

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Alkali metals	Hydrogen
Alkali metals (Li, Na etc.) have one electron in the valence shell and they donate one electron to attain inert gas electron configuration.	Similarly, hydrogen has one electron in the valence shell and hydrogen donate one electron to attain stable configuration.
They form monovalent cations.	Forms monovalent H+ cation.

Compare hydrogen with the alkali metals on the basis of: ion formation. ​

Compare hydrogen with the alkali metals on the basis of: ion formation.