The particles emitted when \( ^{39}_{19}K \text{ decay to } ^{39}_{19}K \) is

Explanation

³⁹₁₉K ³⁹₁₉K.
Since neither the mass number (39), nor the atomic number (19) is affected by the emission,the particles emitted can only be gamma ray, which is not a charge particle, but simply a radiation.

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