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  • The ionisation energy of hydrogen is high as compared to alkali metals because ofOption: 1 Small atomic size<st

The ionisation energy of hydrogen is high as compared to alkali metals because of

Option: 1

Small atomic size


Option: 2

Presence of only one electron in valence shell


Option: 3

Presence of only one proton
 


Option: 4

No neutron


Answers (1)

best_answer

Hydrogen has only one orbital 1s which is strongly attracted to its nucleus. Due to small atomic size of Hydrogen, the valence shell electron is tightly
bound to the nucleus whereas valence shell electrons in alkali metals lack such attraction towards nucleus. Due to this strong attraction force, it takes more energy to remove an electron from Hydrogen atom.

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manish painkra

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