Question

Calculate the radius of Bahr's 3rd orbit in its 2nd row. ​

Answer 1

Correct option is

C

4.761A

o

The radius of an orbit is given by,

r=

4π

2

mZe

2

n

2

h

2

Substituting the values of h,m,z=1 for hydrogen and the electron charge army be calculated as

r=0.529×n

2

A

0

For n=3

r=4.761A

0

Hence, the correct option is C

Answer 2

Answer:

The Bohr Theory gives accurate values for the energy levels in hydrogen-like atoms, but it has been improved upon in several respects. Hence, the radius of 2nd and 3rd Bohr orbit in a hydrogen atom is 2.116 and 4.761 Angstrom.