Question

The ionisation energy of hydrogen atom is
13.6 eV, the ionisation energy of helium atom would be
(a) 13.6 eV (b) 27.2 eV
(c) 6.8 eV (d) 54.4 eV

Answer 1

Answer:

(D) 54.4 eV

Explanation:

IE of hydrogen=13.6eV

IE of helium = IE of hydrogen×Z^2

=>IE of helium = 13.6×2^2

=>IE of helium = 13.6 × 4

=>IE of helium = 54.4 eV

Hope this answer is helpful.