Radioactivity – Flashcards
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alpha particle
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Particle radiating from the nucleus of some atoms. Identical to a helium nucleus.
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beta particle
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Negative particle identical to an electron but radiating from a decaying nucleus.
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gamma ray
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High-intensity bundle of energy being emitted from some decaying nuclei.
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disintegrate
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Radioactive elements are radioactive because they have nuclei that _________, or fly apart.
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nuclei
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The _____ are unstable and cannot stick together indefinitely in the combination in which they form naturally.
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beta particles
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These are sharply bent to the north pole.
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alpha particles
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These are slightly bent toward the south pole.
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gamma particles
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These are not affected by the magnet.
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phosphorescents
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Substances that will glow in the dark after being exposed to sunlight.
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radioactivity
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High-energy subatomic particles, disintegration of the nucleus, and unstable atoms.
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The Wilson Cloud Chamber
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This is used to study direction, speed, and distance of radioactivity.
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Geiger Counter
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This is used to measure radioactive intensity.
