Question

4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :

• A. 6p > 5f > 4d > 5p
• B. 5f > 6p > 4d > 5p
• C. 5f > 6p > 5p > 4d
• D. 6p > 5f > 5p > 4d

Answer 1

Answer: (C)

(n + l) values for, 4d = 4 + 2 = 6
5p = 5 + 1 = 6
5f = 5 + 3 = 8
6p = 6 + 1 = 7
$\therefore$ Correct order of energy would be 5f > 6p > 5p > 4d