The quantum numbers of the last electron of silicon are ________. A)n = 3,ℓ = 1,m_ℓ = 1,m_s = 1 B)n = 2,ℓ = 1,m_ℓ = 1,m_s = +1/2 C)n = 4,ℓ = 1,m_ℓ = 1,m_s = +1/2 D)n = 3,ℓ = 1,m_ℓ = 0,m_s = +1/2 E)n = 2,ℓ = 0,m_ℓ = 0,m_s = +1/2

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Quizplus · Accepted Answer

Silicon has an atomic number of 14, meaning the last electron fills the 3p orbital (n=3, ℓ=1). The mℓ value for the first 3p electron is 0, and the ms value for an unpaired electron is +1/2, matching option D.

The Quantum Numbers of the Last Electron of Silicon Are