Which of the following principles/rules limit | vedclass

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(B) The correct answer is $(B)$.According to Pauli's exclusion principle,no two electrons in an atom can have the same set of all four quantum numbers

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Pauli's exclusion principle

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(B) The correct answer is $(B)$.According to Pauli's exclusion principle,no two electrons in an atom can have the same set of all four quantum numbers $(n, l, m_l, m_s)$.Since an orbital is defined by the first three quantum numbers $(n, l, m_l)$,the only way to distinguish two electrons in the same orbital is by their spin quantum number $(m_s)$,which can only have values of $+1/2$ or $-1/2$.Therefore,an orbital can accommodate a maximum of two electrons with opposite spins.

Which of the following principles/rules limits the maximum number of electrons in an orbital to two?

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