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level: radioactivity + half life

Questions and Answers List

level questions: radioactivity + half life

QuestionAnswer
protons and neutrons of an alpha particle2 protons, 2 neutrons, similar to a helium nucleus
work out237, 93
work out131, 54
what is half lifethe time it takes for the number of nuclei in a radioactive isotope to half
solve25 counts/s
what is irradiationexposing an object to nuclear radiation
why do people dealing with ionising radiation have to take more precautionionising radiation can increase the chance of mutating cells and causing cancer
what is radioactive contaminationwhen unwanted radioactive isotopes end up on or in other materials, hazardous as radioactive isotopes decay and emit ionising radiation
what is the most ionising radiationalpha, it is strongly ionising but easily stopped by dead cells on surface of the skin, very dangerous if inhaled or swallowed
what other radiation is ionisingbeta, can penetrate though skin and body
which radiation is least ionisinggamma radiation, passes straight through body cells so theses a less chance of ionising and cell mutation