Question

4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :
(1) 5f > 6p > 5p > 4d
(2) 6p > 5f > 5p > 4d
(3) 6p > 5f > 4d > 5p
(4) 5f > 6p > 4d > 5p

Answer 1

third is the correct option

6

Answer 2

The order of decreasing energy of  4d, 5p, 5f and 6p orbitals is 5f > 6p > 5p > 4d.

Step by step explanation:

The energy of the orbital can be calculated by using "(n+l)" value.

l = 0,1,2,3 for s,p,d and f orbitals.

Let's calculate the energy of each orbital

For "4d" orbital:

                      $\Rightarrow 4+2 = 6$

For "5p" orbital:

                      $\Rightarrow 5+1 = 6$

For "5f" orbital:

                      $\Rightarrow 5+3 = 8$

For "6p" orbital:

                      $\Rightarrow 6+1 = 7$

Therefore, the correct order of energy would be 5f > 6p > 5p > 4d.

Hence, correct option is 1