Which pairs of subshells have the same (n + ℓ) value? I. 2p and 3s II. 5s and 4p III. 7s and 4f

Verified Answer & Explanation⌄

Correct Answer: D) I, II and III

Concept Explanation

2p: 2 + 1 = 3; 3s: 3 + 0 = 3 5s: 5 + 0 = 5; 4p: 4 + 1 = 5 7s: 7 + 0 = 7; 4f: 4 + 3 = 7 Therefore, all three pairs have equal (n + ℓ) values.