Question

The number of radial nodes of 3s and 2p -orbitals are respectively

(a) 2, 0

(b) 0, 2

(c) 1, 2

(d) 2, 1

Answer 1

Answer is : (a) 2, 0

Number of radial nodes = n - l - 1

For 3 s-orbital n = 3, l = 0

∴ Number of radial nodes = 3 - 0 - 1 = 2

For 2p-orbital, n = 2, l = 1

Number of radial nodes = 2 - 1 - 1 = 0