the electronic configuration of Fe is 1s2 2s2 2p6 3s2 3p6 4s2 3d6 but for Fe2+ due to the lose of 2 electrons the electronic configuration of Fe2+ is 1s2 2s2 2p6 3s2 3p63d6 4s0

Electronic Configuration of Fe2+ Ion

The electronic configuration of an ion is determined by the number of electrons it has gained or lost compared to its neutral state. In the case of Fe2+ ion, it means that the iron atom has lost two electrons. To understand the electronic configuration of Fe2+ ion, we need to first examine the neutral state of iron.

Neutral Iron Atom
The atomic number of iron (Fe) is 26, which indicates that it has 26 electrons in its neutral state. The electronic configuration of a neutral iron atom can be represented as follows:

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

Formation of Fe2+ Ion
When two electrons are lost from the neutral iron atom, it forms the Fe2+ ion. The loss of these two electrons occurs from the 4s orbital, as it is the outermost orbital and has a higher energy level than the 3d orbital. Therefore, the electronic configuration of Fe2+ ion can be determined as follows:

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

Explanation
- The neutral iron atom has 26 electrons, which are distributed among various energy levels and orbitals.
- The electronic configuration of a neutral iron atom is represented by the arrangement of electrons in the 1s, 2s, 2p, 3s, 3p, and 3d orbitals.
- When two electrons are lost from the 4s orbital, the Fe2+ ion is formed. This loss of electrons results in a change in the electronic configuration.
- The Fe2+ ion has a new electronic configuration with 24 electrons, as two electrons have been removed from the neutral iron atom.
- The electronic configuration of Fe2+ ion is represented by the arrangement of electrons in the 1s, 2s, 2p, 3s, 3p, and 3d orbitals, with the 4s orbital now being empty.

Summary
In summary, the electronic configuration of Fe2+ ion is obtained by removing two electrons from the neutral iron atom. The Fe2+ ion has an electronic configuration with 24 electrons, where the 4s orbital is empty. The electronic configuration is represented by the arrangement of electrons in the 1s, 2s, 2p, 3s, 3p, and 3d orbitals.