Question

The correct ground state electrons configuration of chromium atom Z =24 is

Answer 1

1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^5

Or

[Ar] 4s^1 3d^5

Answer 2

Answer:

Concept:

Electronic configuration refers to how the electrons are arranged inside the electronic levels of the ab atom. The placement of the electrons is determined by their energies and available space. When placing the electrons in an atom, we adhere to a few sets of laws.

Explanation:

• Atomic number of chromium =24 (expected configuration)

• Based on the order i.e. 1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<5p<6s<4f<5d<6p<7s<5f<6d

•°• 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^4

• In s-orbital maximum electron=2

• In p-orbital maximum electron=6

• Actual configuration: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^5

• In 4s one electron will be shifted to 3d atom

•°• Because the actual configuration follows more stability.

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