History of the atom 0.0 / 5 ? ChemistryAtomsGCSEEdexcel Created by: LaurenkjCreated on: 11-03-19 21:08 What did John dalton describe an atom as in 19th century Solid spheres and different spheres were made up different elements 1 of 10 Who found out from their experiments that atoms weren’t solids spheres J J Thomson 2 of 10 What was the plum pudding model That atom must contain even smaller negatively charged particles - electrons 3 of 10 Who created plum pudding model J J Thomson 4 of 10 Who showed that plum pudding model was wrong Rutherford 5 of 10 How was the plum pudding model shown as wrong Gold foil experiment - fired positively charged alpha particles at extremely thin sheet of gold 6 of 10 With the gold foil experiment what was EXPECTED to happen and why The particles to pass straight through the sheet or be slightly deflected bc there was THOUGHT to be a lot of positive charge throughout atom 7 of 10 what ACTUALLY happened in the gold foil experiment Most particles did go through some were deflected and some even deflected baCkwArDs 8 of 10 What was ruthorfords theory to explain his evidence from gold foil experiment Nuclear atom - there’s a tiny positively charged nucleus in middle, surrounded by a cloud of negative electrons 9 of 10 What did Bohr suggest That electrome only exist in fixed orbits or Shells nowhere in between - fixed energy 10 of 10
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