Question

In Bohr's model of H-atom, the radius of the first electron orbit is 0.53 Å. What will be the radius of the third orbit and the first orbit of singly ionised helium atom?​

Answer 1

Solution

Given:-

(Correct option is D)

Formula for Bohr's radius,

r

n

=n

2

r

1

r

3

=3

2

×0.53=4.77A

o

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