Following data is available about `3` nuclei `P,Q & R`. Arrange then in decreasing order of stability
`|{:(,P,Q,R,),("Atomic mass number (A)" ,10,5,6,),("Binding Energy (Mev)",100 ,60 ,66,):}|`

Explanation

To arrange the nuclei P, Q, and R in decreasing order of stability, we will calculate the stability of each nucleus using the formula:

\[ \text{Stability} = \frac{\text{Binding Energy}}{\text{Atomic Mass Number (A)}} \]

### Step 1: Calculate Stability for Nucleus P
- **Binding Energy for P**: 100 MeV
- **Atomic Mass Number (A) for P**: 10

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