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The ground-state orbital radius of the electron in hydrogen is about what?
A5.3 × 10⁻¹¹ m
B5.3 × 10⁻¹⁰ m
C5.3 × 10⁻⁹ m
D2.2 × 10⁻¹¹ m
Answer & Solution
Correct answer: A. 5.3 × 10⁻¹¹ m
Using E = -e²/8πε₀r with E = -13.6 eV gives r = 5.3 × 10⁻¹¹ m.
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