Nuclear structure 0.0 / 5 ? PhysicsRadioactivityGCSEAQA Created by: SLowtherCreated on: 09-01-17 17:05 What was the first model of the atom? The plum pudding 1 of 6 Who put forward the Plum Pudding idea? J.J Thompson 2 of 6 What did he believe the atom was? A cloud of positive charge with tiny negatively charged electrons embedded inside. 3 of 6 Describe an observation and conclusion of the nuclear structure 1. Most alpha particles passed straight through so nucleus is small and most of the atom is empty space 4 of 6 Describe another observation and conclusion 2. Some particles were deflected so most of the mass of the atom must be in the nucleus. 5 of 6 Describe a final observation and conclusion 3. About 1 in 1000 alpha particles completely rebounded(repelled) so nucleus must be positively charged 6 of 6
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