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Sem A Unit 5
Physical Science 9
| Term | Definition |
|---|---|
| alpha decay | radioactive decay in which an alpha particle is released |
| alpha particle | a particle composed of 2 protons and 2 neutrons often involved in nuclear processes |
| atomic number | the number of protons in an atom of an element |
| beta decay | radioactive decay in which a beta particle is released |
| gamma decay | radioactive decay in which gamma rays are released |
| mass number | the sum of the protons and neutrons that make up the nucleus of an atom |
| neutron | a particle that has no charge and is present in the nucleus of most atoms |
| nuclear chain reaction | a series of nuclear fission reactions in which the particles produced in one reaction cause the next reaction to occur |
| nuclear fission | a nuclear process in which a large nucleus splits into smaller nuclei |
| nuclear fusion | a nuclear process in which small nuclei join to form a larger nucleus |
| nucleus | the small, dense, positively charged center of an atom |
| proton | a positively-charged particle that makes up the positive charge in the nucleus of an atom |
| radioactive decay | the process by which an unstable nucleus releases radiation in the form of particles and/or energy |
| transmutation | the conversion of an atom of one element into an atom of a different element through nuclear changes |
Created by:
Kaplocher
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