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The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is:

1. 5, 0, 0, 2 1 +
2. 5, 0, 1, 2 1 +
3. 5, 1, 0, 2 1 +
4. 5, 1, 1, 2 1 +

Correct answer: 5, 0, 0, 2 1 +

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