In both `beta^(-1)` and `beta^(+)` decay processes, the mass number of a nucleus remains same, whereas the atomic number Z increases by one in `beta^(-)` decay and decreases by one in `beta^(+)` decay. Explain by giving reason.

Explanation

To understand the differences between beta minus (β^-) and beta plus (β^+) decay processes, we need to analyze what happens to the atomic number (Z) and mass number (A) during each decay.

### Step-by-Step Solution:

1. **Understanding Beta Minus Decay (β^-)**:
- In beta minus decay, a neutron in the nucleus is transformed into a proton.
- This process can be represented as:
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