Question

Number of radial nodes present in 3p. 

(1) 0 

(2) 1 

(3) 2 

(4) 4

Answer 1

Correct option is (2) 1 

Number of radial nodes = n – l – 1 

n = 3, l = 1 

= 3 – 1 – 1 

= 1

Answer 2

For the 3p orbital, the '3' means that 'n' = 3 and 'p' shows that 'ℓ' = 1. 'ℓ' also equals the number of angular nodes which means there is one angular node present. Using the equation for radial nodes, n - ℓ - 1 = 3 - 1 - 1 = 1. Thus there is one radial nodes.