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Correct set of quantum number for the valence electron of radioactive element of alkali metal is

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n = 7; l=1, and m_l = 0

n = 7; l=0, and m_l = 0

n = 6; l=1, and m_l = 0

n = 6; l=0, and m_l = 0

answer is D.

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Detailed Solution

Radioactive element of alkali metal is Fr

Electronic configuration: [Rn]7s¹

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