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of 1200 atoms During the first half-life, 600 atoms disintegrate and 600 remain.

The decay of uranium to thorium is one example of alpha emission.The conversion of a proton to a neutron results in the emission of a positron, \(_1^0β\).\[\ce\] The emission of an alpha or a beta particle often produces an isotope in an unstable, high energy state.Instead, we can measure its activity after an elapsed time, Few analytes are naturally radioactive.For many analytes, however, we can induce radioactivity by irradiating the sample with neutrons in a process called neutron activation analysis (NAA).

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Sometimes we omit The most important types of radioactive particles are alpha particles, beta particles, gamma rays, and X-rays.

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