Question

The excitation energy of a hydrogen atom from its ground state to its third excited state is

1 point

(a) 12.75 eV

(b) 0.85 eV

(c) 10.2 eV

(d) 12.1 eV​

Answer 1

Answer:

ANSWER

The required energy for excite a hydrogen atom from its ground state to its third excited state is:

E

n

=−

n

2

13.6

Z

2

where n=1 for ground state and n=4 for third excited state, and Z=1 for hydrogen.

E

n

=−

4

2

13.6

1

2

E

n

=0.85eV

Hence the correct option is C.