Question

the correct ground state electronic configuration of chromium atom ( z= 24) is. (a) [Ar] 3d5 4s1 (b) [ Ar] 3d4 4s2 (c) [Ar] 3d6 4s0 (d) [Ar] 4s1 4p5​

Answer 1

Answer:

option a

Explanation:

We need to write the Electronic configuration of chromium. We will start with the atomic number of chromium.

The atomic number of chromium = 24

The electron configuration for Chromium the first two electrons will go in the 1s orbital.

Since 1s can only hold two electrons the next 2 electrons for Chromium go in the 2s orbital. The next six electrons will go in the 2p orbital.

The p orbital can hold up to six electrons.

The next two electrons in the 3s.

Later the next six electrons.

Now shift to the 4s orbital where we place the remaining two electrons.

The remaining electrons move in the 3d orbital.