Question

The speed of an electron in the orbit of hydrogen atom in the ground state is –

• A. c
• B. c/10
• C. c/2
• D. c/137

Answer 1

Answer: (D)

c/137

Answer 2

v = $\frac{c}{137}\left( \frac{Z}{n} \right)$ Q Z = 1, n = 1 \ c/137