These particles make up

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Presentation transcript:

These particles make up Radioactivity This was discovered by Becquerel in the 1890’s. A radioactive element is not stable. Unstable elements will decay over time. When an element decays, particles in the nucleus escape into their surroundings. These particles make up nuclear radiation

Radioactivity There are different radioactive particles. Each particle has it’s own charge. Each particle has different penetration powers. Beta (β), charge of -1, stopped by thin metal. Gamma (γ), charge of 0, stopped by concrete. Alpha (α), Charge of +2, stopped by cardboard. Alpha (α) Beta (β) Gamma (Y)

Radioactivity If radioactive particles are allowed to pass through charged plates, some particles will be deflected. Alpha particles go towards the negative plate Gamma particles are not deflected either way Beta particles go toward the positive plate