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**[SOLVED] speed of electrons**

## Homework Statement

In the Bohr model of the hydrogen atom, an electron circles a proton at a radius of 5.3e-11 m. How fast must the electron be moving if the centripetal acceleration is to be supplied by Coulombic attraction?

## Homework Equations

L=n(h/2pi) where h is Plancks constant and n is an integer

L=rmv

## The Attempt at a Solution

n(h/2pi)=rmv

v=n(h/2pi)/(rm)

v= n(6.63e-34/2pi)/(5.3e-4)(9.11e-31)

v= 0.218n m/s

Now that velocity seems way to small for a speed of an electron...

Any help is appreciated! Thanks!