Answer:
5
Explanation:
F:1s²2s²2p₋₁²2p₀²2p₊₁¹
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QN's for each of nine Fluorine e⁻'s => values in 'bold' are the orbital (or, azimuthal) QN's with values = +1.
n l m mₓ
1s¹ 1 0 0 +1/2
1s² 1 0 0 -1/2
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2s¹ 1 0 0 +1/2
2s² 1 0 0 -1/2
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2p₋₁¹ 1 +1 -1 +1/2
2p₀¹ 1 +1 0 +1/2
2p₊₁¹ 1 +1 +1 +1/2
2p₋₁² 1 +1 -1 -1/2
2p₀² 1 +1 0 -1/2
2p₊₁ (empty orbital)
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