Electronic Configuration of the Stable Ion with 10 Electrons in the N Shell

To determine the electronic configuration of the stable ion with 10 electrons in the N shell, we need to understand the rules governing electron filling in atomic orbitals.

1. Aufbau Principle:
The Aufbau principle states that electrons fill the lowest energy orbitals first before moving to higher energy orbitals. Therefore, we begin by filling the lower energy orbitals before moving to the higher ones.

2. Pauli Exclusion Principle:
The Pauli exclusion principle states that no two electrons in an atom can have the same set of four quantum numbers. This means that each orbital can accommodate a maximum of two electrons with opposite spins.

3. Hund's Rule:
Hund's rule states that electrons will occupy empty orbitals of the same energy level individually before pairing up. This principle ensures maximum electron spin alignment and stability.

Electronic Configuration:
The N shell corresponds to the third energy level (n=3) in an atom. The orbitals in the third energy level are 3s, 3p, and 3d.

1. 3s Orbital:
The 3s orbital can accommodate a maximum of two electrons. As per the Aufbau principle, we fill the lower energy 3s orbital before moving to higher energy orbitals. Therefore, the electronic configuration of the 3s orbital in the N shell is 3s².

2. 3p Orbitals:
The 3p orbitals (3px, 3py, and 3pz) can accommodate a maximum of six electrons (two in each orbital). According to Hund's rule, electrons will occupy empty orbitals individually before pairing up. Therefore, the electronic configuration of the 3p orbitals in the N shell is 3p⁶.

3. 3d Orbitals:
The 3d orbitals (3dxy, 3dxz, 3dyz, 3dx²-y², and 3dz²) can accommodate a maximum of ten electrons (two in each orbital). However, the 3d orbitals are in the next higher energy level (n=4) and are not part of the N shell. Therefore, they do not contribute to the electronic configuration of the stable ion with 10 electrons in the N shell.

Final Electronic Configuration:
Based on the above analysis, the electronic configuration of the stable ion with 10 electrons in the N shell is:
3s² 3p⁶

This configuration represents a stable ion with a completely filled N shell.