P3 Particles in Action

Defintions of Key Words

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Absolute Zero

The coldest temperature that can be reaches 0K or -273

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Alpha Decay

the emission of alpha particles by unstable nuclei containing more than 82 protons

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Alpha Particle

Consists of 2 protons and 2 neutrons

emitted from nuclei of radioactive substances during alpha decay

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Beta Decay

the emission of An electron or positron from an unstable nucleus giving a nucleus with the same mass number but different proton number

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heated metal wire that emits electrons

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Daughter Nucleus

more stable nucleus produced by radioactive decay of an unstable nucleus

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negatively charged particle

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Electron Gun

device that uses a heated cathode and attractive anode to acclerate the elcetrons emitted from the cathode by thermionice emission

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Fundamental Particles

The smallest particles that can exist

used to make other more complex particles

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atoms of the same element that have the same number of protons but a different number of neutrons

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Kelvin Scale

the temperature scale used by scientists

1 degrees= 1K

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fundamental particle like a electron or positron

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a neutrally charged subatomic particle found in a nucleus of atoms

made from up, down down quarks

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a device using a beam of electrons that show patterns produced by rapidly changing voltages

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