Question

If the speed of electron in the Bohr's first
orbit of hydrogen atom be x, then
speed of the electron in the 3rd orbit
is :
(A) x/9
(B) x/3
(C) 3x
(D) 9x​

Answer 1

Answer:

Hola‼.......❤

1st comes bohr quantization mvr=nh2π

then comes force responsible to revolve the electron around the nucleus.

mv^2/r = ze^2/r^2

from this two you have, v∝1/n

So, the answer is x/3

Hope it's helpful....... ☺