![]() ![]() If the half-life of the element is T½ from the decay law, we can write that ? = ? 0 □ −λ? Nuclear Reaction : Nuclear chemistry is the study of reactions that involve changes in nuclear structure. If a sample of a radioactive element initially contains N 0 atoms, after an interval of one half-life the sample will contain N atoms. We may express such a nuclear decay by the nuclear reaction equation ?□?→ ? − 2□ − 4? + 24□□ (parent) (daughter) ( α -particle) The radioactive decay law enables us to determine a relation between the half-life of a radioactive element and the decay constant. The nucleus formed by this decay is called the ‘daughter nucleus’. Therefore, the nucleon number (A) changes by 4 and the proton number (Z) changes by 2. The nucleus of the so-called ‘parent’ element loses two neutrons and two protons. Lab 11: PhET LAB: Alpha Decay Names: Julianna Castillo, Cynthia Mendoza, Mikayla Robles, Hunter Virkus Section: PHYS 1402-L Theory : A nucleus of a radioactive element that emits an α -particle must transform into a nucleus of another element.
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