Alpha decay produces a new isotope with a mass number that is less than the that of the parent isotope by ______.Multiple choice question.3241
Question
Alpha decay produces a new isotope with a mass number that is less than the that of the parent isotope by ______.Multiple choice question.3241
Solution
Alpha decay produces a new isotope with a mass number that is less than that of the parent isotope by 4.
In alpha decay, an alpha particle is released from the nucleus of the parent atom. An alpha particle consists of 2 protons and 2 neutrons, which means it has a mass number of 4. Therefore, the new isotope formed after alpha decay will have a mass number that is 4 less than the parent isotope.
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Which of the following is the best description of an isotope?
What is the mass number of an isotope equal to?Choose 1 answer:Choose 1 answer:(Choice A) the number of protons plus the number of neutronsAthe number of protons plus the number of neutrons(Choice B) the number of protons plus the number of electronsBthe number of protons plus the number of electrons(Choice C) the number of protons minus the number of neutronsCthe number of protons minus the number of neutrons(Choice D) the number of protons minus the number of electronsDthe number of protons minus the number of electrons
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