Atomic Structure - Physics 0.0 / 5 ? PhysicsRadioactivityGCSEAQA Created by: vickieboadiCreated on: 26-10-18 16:00 what are the 4 types of radio active decay alpha, beta, gamma, neutron 1 of 10 what is an alpha particle an alpha particle is a helium nucleus 2 of 10 what is a beta particle a beta particle is a fast moving electron which is emitted from the nucleus 3 of 10 what is gamma decay Gamma rays are short wave-lengths, with high frequency electromagnetic waves 4 of 10 what is activity measured in Becquerels (Bq) 5 of 10 what is the equation for finding the count rate of a radioactive source from a GM tube corrected count rate = total count rate - background count rate 6 of 10 what is the half-life of an isotope the half-life of an isotope is the time it takes for the number of nuclei ina sample to halve 7 of 10 what does it mean if an object is said to be contaminated an object is said to be contaminated if it contains radioactvie nuclei which will go on to decay and release ionising radiation 8 of 10 what does irradiation mean it is the process of exposing an object to ionising radiation 9 of 10 what steps should be taken to minimise levels of radiation mimimise time exposure, maximise distance from source use appropriate absorbents 10 of 10
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