Give the set of four quantum numbers that represent the last electron added (using the Aufbau principle)to the Zn atom. A)n = 4,l = 3,m_l = 3,m_s = - B)n = 3,l = 2,m_l = 2,m_s = - C)n = 3,l = 1,m_l = 1,m_s = + D)n = 3,l = 3,m_l = 2,m_s = - E)n = 4,l = 2,m_l = 0,m_s = +

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According to the Aufbau principle, the electrons fill up the lowest energy level first, and then successively fill higher energy levels until all electrons have been accounted for. Starting with the Zn atom, which has atomic number 30, we can fill the electrons in the 1s, 2s, and 2p orbitals (up to 10 electrons). The next energy level is 3, so the last electron would be added to a 3d orbital. Therefore, the set of four quantum numbers that represent the last electron added would be n=3, l=2, ml=0 (since there is only one electron in the 3d orbital), and ms=-1/2 (since Zn has a neutral charge, there are as many electrons with spin-up (+1/2) as there are with spin-down (-1/2)). This corresponds to choice B.

Give the Set of Four Quantum Numbers That Represent the Last