P4 0.0 / 5 ? ScienceAtomsGCSEAQA Created by: YEETUSdeleetusfetusCreated on: 02-01-22 18:08 97810524136 Across 1. What was J J Thompsons theory? (4, 7, 5) 5. Stopped by 5mm of aluminium and has 1 electron. (4) 6. Has no mass or charge and can be stopped by thick sheets of lead and multiple metres of concrete. (5) 9. Who developed democritus' ideas? (4, 6) 10. I have the same number of protons, different number of neutrons. What am I? (7) Down 2. C an be absorbed by a sheet of paper. Consists of 2 neutrons and 2 protons. (5) 3. Who developed the nuclear model? (5, 4) 4. who developed the first atomic theory? (10) 7. Time taken for number of radioactive nuclei/activity to half. (4, 4) 8. Who discovered neutrons? (5, 8)
Comments
No comments have yet been made