Question

If 12.4eV energy is required to jonize the
hydrogen atom, then energy required to
remove an electron from n = 2 are:
a) 3.1eV
c) 10.4eV
b) 6.2ev
d) Oev
O
A
OB​

Answer 1

Given:

The energy E'= 12.4

The n= 2

To find:

The energy required to remove electron from n=2

Solution:

The formula shows relation between the energy is

E=E'z(1/n'² - 1/n"²)

n'=2

n"=∞

z=1

Putting the values in above formula

E=12.6×1×(1/4 - 1/∞)

E=12.6/4

E=3.1 eV

So the energy required in removing electron is 3.1 eV

So the correct option is A