P4 0.0 / 5 ? ScienceAtomsGCSEAQA Created by: YEETUSdeleetusfetusCreated on: 02-01-22 18:08 who developed the first atomic theory? democritus 1 of 13 Who developed democritus' ideas? John Dalton 2 of 13 What was J J Thompsons theory? Plum pudding model 3 of 13 What experiment did Rutherford carry out? Alpha scattering method 4 of 13 Who developed the nuclear model? Niels Bohr 5 of 13 Who discovered neutrons? James Chadwick 6 of 13 I have the same number of protons, different number of neutrons. What am I? Isotope 7 of 13 Only one or two isotopes are stable. Radioactive decay 8 of 13 C an be absorbed by a sheet of paper. Consists of 2 neutrons and 2 protons. Alpha 9 of 13 Stopped by 5mm of aluminium and has 1 electron. Beta 10 of 13 Has no mass or charge and can be stopped by thick sheets of lead and multiple metres of concrete. Gamma 11 of 13 Overall rate of decay in isotopes. activity 12 of 13 Time taken for number of radioactive nuclei/activity to half. Half-life 13 of 13
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