In a hydrogen atom, if the electron is replaced by a particle which is 200 times heavier but has the same charge, how would its radius change?
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To solve the problem of how the radius of a hydrogen atom changes when the electron is replaced by a particle that is 200 times heavier but has the same charge, we can follow these steps:
### Step 1: Understand the formula for the radius of the hydrogen atom
The radius of the nth orbit of a hydrogen atom is given by the formula:
\[
r_n = \frac{\epsilon_0 n^2 h^2}{\pi m e^2}
\]
...
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