Question

Ionisation energy of hydrogen atom is 13.6ev wht is ionization energy of he+

Answer 1

Calculate energy of electron in first orbit of He+ ion.

Which is equal to 54.5 eV.

Answer 2

Explanation:

I.E. = 13.6 z2/n2 ev

z is atomic no. and n is shell no

z = 2 ( atomic no of He is 2), n=1

so, I.E. of He = 13.6 × z2/ n2

= 13.6 × 4/1

= 54.4 ev