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The radius of innermost electron orbit of a hydrogen
\( \mathrm{P} \)
atom is \( 5.3 \times 10^{-11} \mathrm{~m} \). What is the radius of orbit in
W
second excited state?
(1) \( 5.5 \times 10^{-10} \mathrm{~m} \)
(2) \( 4.77 \times 10^{-12} \mathrm{~m} \)
(3) \( 5.5 \times 10^{-14} \mathrm{~m} \)
(4) \( 4.77 \times 10^{-10} \mathrm{~m} \)
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