Question

(3)
If r1 is the radius of first orbit of hydrogen atom, then the radii of second, third and fourth orbit in terms of r1 are
(1) 8r1, 27r1, 64r1
(2) 2r1, 6r1, 8r1
(3) 4r1, 9r1, 16r1
(4) r1, 2r1,,3r1​

Answer 1

Explanation:

Radii of nth orbit=Zn2r1

r1= radius of first orbit of H− atom

So, r2=122r1=4r1

r3=132r1=9r1

r4=142r1=16r1

So, 4r1,9r1,16r1.

Correct option is (3)