When a beta particle is given out, the atomic number of the parent atom :

Foundation

Physics Foundation

EMI

Question

Increases by unity

Decreases by unity

Is halved

Remains the same

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Beta decay involves a neutron transforming into a proton and emitting an electron (beta particle). This process increases the number of protons in the nucleus.

The general equation for beta minus decay is: $X_{A}^{Z} \to Y_{A}^{Z + 1} + e_{-}^{0} + \bar{ν}$ The mass number (A) remains the same, but the atomic number (Z) increases by 1.

Final Answer: Increases by unity