Question

what happens when atoms of same spins reacts?

Answer 1

Generally, electrons fill the atom's orbitals in pairs. If one of the electrons in a pairspins upward, the other spins downward. It's impossible for both of the electrons in a pair to spin in the same direction. ... A whole magnet's magnetic moments come from the moments of all of itsatoms.

Answer 2

If one of the electrons in a pair spins upward, the other spins downward.
It's impossible for both of the electrons in a pair to spin in the same direction. This is part of a quantum-mechanical principle known as the Pauli Exclusion Principle. ... A whole magnet's magnetic moments come from the moments of all of its atoms.

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