For atoms to combine they need to have opposite spin when they approach,but if they have opposite spin acc to Pauli exclusion 1 must be + and other should be - . so let us suppose H2 one h atom has +1/2 and other has -1/2 before the reaction but 2 h will violate the Hunds principle of maximum multiplicity by having a - spin before + . So how the things work?
Answers
Answer:
If there were three possible values for the spin quantum number, each orbital could hold three different electrons and still obey the Pauli exclusion principle. In other words, each orbital could hold three electrons and none of those three electrons would have the exact same four quantum numbers.
State the Pauli Exclusion Principle, and use it to explain why electrons in the same orbital must have opposite spin states? If both electrons in the same orbital had the same spin state, each electron would have the same fourth quantum number is different and the exclusion principle is obeyed.
Pauli's Exclusion Principle states that no two electrons in the same atom can have identical values for all four of their quantum numbers. In other words, (1) no more than two electrons can occupy the same orbital and (2) two electrons in the same orbital must have opposite spins.
Thank you!