Question

If the ionisation energy for hydrogen atom is 13.6ev, then ionisation energy for He+ ion should be
a) 13.6ev
b) 6.8ev
C) 54.4ev
d) 72.2ev explain

Answer 1

Heya!!

Here's your answer!!!

= number of electrons in H = 1

= number of neutron in H = 0

= ionisation energy for H atom = 13.6ev

= as number of electron in Helium = 2

= and number of neutron in Helium = 2

= ionisation energy for Helium atom
= 54.4ev

Glad help you
it helps you
thank you

@vaibhavhoax
#born with attitude

Answer 2

E = (13.6xZ^2) / n^2 eV

Where,

n = number of orbit = 1 

Z = atomic number = 2 (for He)

E => (13.6x2^2) / 1^2

E => (13.6x4)

=> 54.4 eV

So....

Correct option: C)