Atomic radius is of the order of `10^(-8) cm ` and nuclear radius is of the order of `10^(-13)cm` .What fraction of an atom is occupied by nucleus ?

Explanation

To find the fraction of an atom that is occupied by its nucleus, we need to calculate the volumes of both the atom and the nucleus, and then take the ratio of these volumes.

### Step-by-Step Solution:

1. **Identify the Radii**:
- Atomic radius \( r_{atom} = 10^{-8} \) cm
- Nuclear radius \( r_{nucleus} = 10^{-13} \) cm

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