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Me: Research Ansto
Inner Me: Post more memes
Me: ...

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Any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha, beta, and gamma rays.

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Is the process of by which the nucleus of an unstable atom loses energy by emitting radiation,including alpha particles,beta particles,Gemma rays and conversion electrons.

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radioactivity caused by unstable isotopes (radioisotopes)

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radioactivity caused by unstable isotopes (radioisotopes)

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neutron to proton ratio is between 1:1 and 1:1.5  where nuclei is stable

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neutron to proton ratio is between 1:1 and 1:1.5  where nuclei is stable

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Uranium is extremely unstable and it continues to lose protons until it becomes LEAD

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Alpha - nucleus (particle)
Beta - electron (particle)
Gamma - photon (wave)

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alpha particles can be stopped by paper, beta by a few sheets of aluminium, gamma by lead

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hydrogen into deuterium
atom into isotope
half life
used as a great energy source

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alpha decay - least penetrating, high ionising ability
give off an atom consisting of two protons and two neutrons (helium nucleus)
beta decay - medium penetration and ionising ability
gamma decay - high penetration, low ionising ability

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element is radioactive when proton no. is greater than 82 (lead)

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element is radioactive when proton no. is greater than 82 (lead)