How far from the nucleus is the electron in a hydrogen atom if it has energy of \( -0.850 \mathr....

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How far from the nucleus is the electron in a
P
hydrogen atom if it has energy of \( -0.850 \mathrm{eV} \).
W
(1) \( 8.46 \AA \)
(2) \( 9.5 \AA \)
(3) \( 10.12 \AA \)
(4) \( 6.43 \AA \)


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