Question

Wavelength of electron in 3rd orbit of hydrogen atom

Answer 1

Answer:

Radius of 3rd orbit r=R(3)²

=9R

mvr=nh/(2π)

h/(mv)=2πr/n

λ=h/(mv)=2π×9R/3

λ=6πR

λ=6π×(0.529 A˚)

λ=9.97 A˚.