Identify pair of orbitals having similar (n + l) values from the following.

Step-by-step solution

The (n + l) value for an orbital is calculated by adding the principal quantum number n and the azimuthal quantum number l . For s , p , d , and f subshells, the values of l are 0, 1, 2, and 3 respectively. Calculating (n + l) for the given pairs: For 3s and 3p : (3 + 0) = 3 and (3 + 1) = 4 For 2p and 4s : (2 + 1) = 3 and (4 + 0) = 4 For 3d and 4p : (3 + 2) = 5 and (4 + 1) = 5 For 2p and 3p : (2 + 1) = 3 and (3 + 1) = 4 The pair 3d and 4p has the same (n + l) value of 5 . Answer: 3d and 4p