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Radioactivity

QuestionAnswer
Define radioactivity Spontaneous breaking up of unstable nuclei with the emission of one or more types of radiation
Properties of Alpha particles Helium nuclei. Affected my electric fields. Stopped by a sheet of paper.
Properties of Beta particles Electrons. Affected by electric fields. Stopped by 5mm of aluminium.
Properties of Gamma rays Waves of high energy. Unaffected by electric fields. Stopped by several cm of lead.
Properties of nuclear reactions Change takes place in nucleus. A new element is formed. Nuclear radiation is released. No chemical bond breaking or formation.
Define half life The time taken for half of the nuclei in a sample to decay
Define radioisotope A radioactive isotope
Uses of radioactivity Medical uses. Archaeological uses. Agricultural research. Food irradiation. Smoke alarms. Industrial uses.
Created by: JackEatonK98