The second quantum number of a 3p₃ electron in phosphorus 1s2, 2s2, 2p6, 3s2, 3p3 is 3.
Quantum numbers are a set of numbers that describe the position and energy of an electron in an atom.
Principal, azimuthal, magnetic, and spin quantum numbers are the four types of quantum numbers.
Thus, the second quantum number of a 3p₃ electron in phosphorus 1s2, 2s2, 2p6, 3s2, 3p3 is 3.
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