Number of electrons in 3d subshell whose m value is 0

The 3d subshell is a part of the third energy level (n = 3) in an atom. This subshell has five orbitals, each represented by a different m value (-2, -1, 0, 1, 2).

Explanation:
The 3d subshell consists of the following orbitals:
- 3d_-2 with m = -2
- 3d_-1 with m = -1
- 3d₀ with m = 0
- 3d₁ with m = 1
- 3d₂ with m = 2

Each orbital can hold a maximum of 2 electrons, following the Pauli exclusion principle. This principle states that each orbital can contain a maximum of two electrons with opposite spins (one spin up and one spin down). Therefore, the total number of electrons that can be accommodated in the 3d subshell is 10.

Key points:
- The 3d subshell is a part of the third energy level (n = 3) in an atom.
- The 3d subshell consists of five orbitals with different m values (-2, -1, 0, 1, 2).
- Each orbital can hold a maximum of 2 electrons with opposite spins.
- Therefore, the total number of electrons in the 3d subshell is 10.