Question

An orbital has two radial nodes and two angular nodes. It's minimum principal quantum number is ___

Answer 1

Answer :- 5

• radial node = n - l - 1

• angular node = l = 2

• $\red{\implies}$ n - l - 1 = 2

• $\red{\implies}$ n - 2 - 1 = 2

• $\red{\implies}$ n - 3 = 2

• $\red{\implies}$ n = 5

$\rule{10cm}{0.05cm}$

n indicate principal quantum number

• n = 5