Question

The electron configuration of chromium is written as: 152 252 2p 3s 3p6 451 3d5

Is this the expected configuration? Select the correct answer and reason from the options below.
This is the expected configuration.
Both 452 3d4 and 451 3d can
represent the configuration of the
outer orbitals.
This is the expected configuration.
The expected configuration for the
outer orbitals is: 451 3d5
This is not the expected configuration.
O The expected configuration for the
outer orbitals is: 452 4p4
This is not the expected configuration.
O The expected configuration for the
outer orbitals is: 452 3d4

Answer 1

Option D

Step-by-step explanation:

The expected configuration of configuration is

`\\ \sf{:}\!\!\implies 1s^22s^22p^63s^23p^64s^23d^4`

• This is why because 4s orbital is filled first before 3d orbital .

`\sf {:}\!\!\!\rightarrowtail`