What is artificial radioactivity and a-decay, Physics

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Q. What is artificial radioactivity?

The phenomenon by which still light elements are made radioactive by artificial or induced methods is called artificial radioactivity.

α-decay When a radioactive nucleus disintegrates by release an α-particle the atomic number decreases by two and mass number decreases by four.

Instance Radium (₈₈Ra²²⁶) is converted to radon (₈₆Rn²²²) due to α-decay

₈₈Ra²²⁶ → ₈₆Rn²²²+ ₂He⁴

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