Approximately how fast does the electron move in the ground state of hydrogen?
A6.6 x 10^15 m/s
B5.3 x 10^4 m/s
C2.2 x 10^6 m/s
D3.0 x 10^8 m/s
Answer & Solution
Correct answer: C. 2.2 x 10^6 m/s
With r = 5.3 x 10^-11 m and m = 9.1 x 10^-31 kg, the orbital speed works out to about 2.2 x 10^6 m/s.
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