Chapter 13 14 student - Chapter 13 The atomic nucleus and...

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Chapter 13 The atomic nucleus and radioactivity
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Radioactivity Elements with unstable nuclei are radioactive Radioactivity- The process in which unstable atomic nuclei break down and emit radiation
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Alpha particle- The nucleus of a helium atom, which consists of 2 neutrons and 2 protons, ejected by certain radioactive elements Beta Particle-An electron emitted during the radioactive decay of certain nuclei. Gamma rays-High frequency electromagnetic radiation emitted by the nuclei of radioactive atoms.
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Atomic nucleus and strong nuclear force Strong nuclear force- The force of interaction between all nucleons, effective only at extremely close distances.
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Half life- The time required for half the atoms in a sample of a radioactive isotope to decay. Transmutation- The conversion of an atomic nucleus of one element into an atomic nucleus of another element through a loss or gain in the number of protons.
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Radiometric dating Carbon 14 dating-The process of estimating the age of once-living material by measuring the amount of a radioactive isotope of carbon present in the material.
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