Radioactivity 0.0 / 5 ? PhysicsRadioactivityGCSEAQA Created by: emiliannaCreated on: 06-11-17 13:44 type of radiation that is stopped by paper alpha 1 of 13 type of radiation that is stopped by aluminium beta 2 of 13 type of radiation that is stopped by lead gamma 3 of 13 what a radioactive substance contains unstable nuclei 4 of 13 early model of the atom with positive and negative particles plum pudding 5 of 13 atoms of the same element with a different number of neutrons isotope 6 of 13 the number of protons atomic number 7 of 13 the number of protons + neutrons mass number 8 of 13 a process when atoms or molecules become charged ionisation 9 of 13 the number of unstable atoms that decay per minute activity 10 of 13 average time it takes for the number of nuclei in an isotope to halve half-life 11 of 13 the process where certain nuclei split into two fragments, releasing energy nuclear fission 12 of 13 the process where two nuclei are forced together nuclear fusion 13 of 13
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