A uranium nucleus `U-238` of atomic number`92` emits two `alpha`- particles and two `beta`-particles and trasnforms into a thorium nucleus. What is the mass number and atomic number of the thorium nucleus so produced?

Explanation

To solve the problem, we need to determine the mass number and atomic number of the thorium nucleus produced when a uranium-238 nucleus emits two alpha particles and two beta particles.

### Step-by-Step Solution:

1. **Identify the initial parameters:**
- The mass number (A) of uranium-238 (U-238) is 238.
- The atomic number (Z) of uranium is 92.

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