Question

Calculate the ratio of area of second Orbit with fourth Orbit in hydrogen atom

Answer 1

Radius of the nth orbit rn ∝ n2.
For ground state n = 2 and for the first excited state n = 4

Area =3.14xr²

As n is directly proportional to r and r is directly proportional to Area

Therefore

Area of 2 orbit/area of 4 orbit=2²/4²
=4/16=1/4
=1:4