Which set of quantum numbers corresponds to the electrons in He? A)n = 1,l = 0,m_l = 1 B)n = 1,l = 0,m_l = 0 C)n = 1,l = 1,m_l = -0 D)n = 1,l = 0,m_l = -1 E)n = 1,l = 2,m_l = 0

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He has two electrons and is in the ground state, so both electrons will have the same quantum numbers. The only option with the correct principle quantum number of n=1 and orbital angular momentum quantum number of l=0 is option B, which has a magnetic quantum number of mS=0. The spin quantum number (ms) can be +1/2 or -1/2, so it is not listed in the answer options.

Which Set of Quantum Numbers Corresponds to the Electrons in He