Question

# According to the Bohr's atomic model, the relation between principal quantum number (n) and radius of orbit(r) is?

A
rn2
B
r1n2
C
r1n
D
rn

Solution

## The correct option is D $$r\propto n$$Electron angular momentum about the nucleus is an integer multiple of $$\displaystyle\frac{h}{2\pi}$$, where h is Planck's constant.Thus, $$I\omega =mvr=\displaystyle \frac{nh}{2\pi}$$Hence $$r\propto n$$.Physics

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