Question

The ionisation energy of hydrogen is higher than alkali metals. Pick out the correct reason for the above

statement.

(a) Because of smaller

size of H.

(b) Presence of 1e- in

outermost shell

(c) Presence of one proton in its

nucleus

(d) Absence of

neutrons.​

Answer 1

Answer:

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Answer 2

Answer:

Option a. because of smaller size of H.

Explanation:

Hydrogen has only one orbital which is strongly attracted by the nucleus. Thus it has very small size than the alkali metal and hence has high ionization enthalpy.