Question

All the four quantum number can never be same for any two electrons.

• A. Heisenberg Uncertainty principle
• B. Pauli Exclusion Principle
• C. Schrodinger Wave Equation
• D. Hunds Rule
• E. Bohr model of the hydrogen atom

Answer 1

The correct option is B Pauli Exclusion Principle

The Pauli exclusion principle is the quantum mechanical principle that states that two identical fermions (particles with half-integer spin) cannot occupy the same quantum state simultaneously. In the case of electrons, it can be stated as follows: it is impossible for two electrons of a poly-electron atom to have the same values of the four quantum numbers: n, the principal quantum number, $\ell$, the angular momentum quantum number, $m_{\ell }$, the magnetic quantum number, and ms, the spin quantum number. For example, if two electrons reside in the same orbital, and if their $n,\ell ,$and $m_{\ell }$ values are the same, then their $m_s$ must be different, and thus the electrons must have opposite half-integer spins of $+1/2$ and $-1/2.$