Discussion Forum



1)

The ratio of radii of the first three Bohr orbits is


A) 1 : 1/2 : 1/3

B) 1 : 2 : 3

C) 1 : 4 : 9

D) 1 : 8 : 27

Answer:

Option C

Explanation:

Atomic number Z is equal to 1.

The radius of nth orbit rn=0.529n2

The first three orbits values are 1,2,3

Ratio of radius of first three orbit  r1: r2: r3 = $n_{1}^{2} : n_{2}^{2} : n_{3}^{2}$

$\therefore$ 12:22:32

$\therefore$ 1:4:9