In the final Uranium radioactive series the initial nucleus is `U_(92)^(238) ` and the final nucleus is `Pb_(82)^(206)` . When Uranium neucleus decays to lead , the number of a - particle is …….. And the number of `beta` - particles emited is ……

Explanation

To solve the problem, we need to determine the number of alpha (α) and beta (β) particles emitted when uranium-238 decays to lead-206.

### Step-by-Step Solution:

1. **Identify the Initial and Final Nuclei:**
- Initial nucleus: \( U_{92}^{238} \) (Uranium-238)
- Final nucleus: \( Pb_{82}^{206} \) (Lead-206)

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