Atoms 0.0 / 5 ? ChemistryParticlesGCSEOCR Created by: emilysworldCreated on: 30-04-19 08:54 What is an element? One type of atom, one capital letter, found in the periodic table, can't be broken down chemically 1 of 21 What is a compound? More than one different capital letter, more than one different element chemically joined 2 of 21 What is a molecules? More than one atom chemically joined, can be the same element but dosn't have to be 3 of 21 What conclusions were made by Dalton about compounds? compounds are formed from atoms combined together 4 of 21 During what time period were Dalton's theories made? 1800s 5 of 21 Whose idea did Dalton revive? Democritus 6 of 21 True of false? - Dalton believed atoms could be broken down into samaller parts false - he believed that atoms can't be broken down into smaller parts 7 of 21 What did Thomson discover? electrons 8 of 21 What year did Thomson make his discoveru? 1897 9 of 21 What part of Dalton's theory did Thomson disprove? atoms can be broken down into small parts 10 of 21 What was the name of Thomson's atomic model? plum pudding model 11 of 21 Who did Geiger and Marsden complete their research for? Rutherford 12 of 21 Describe the experiment Geiger and Marsden carried out fired a beam of positively charged alpha particles at a paper thin gold sheet 13 of 21 What model did the Rutherford experiment disprove? plum pudding model 14 of 21 What date did Geiger and Marsden carry out their experiment? 1908 15 of 21 What charge did Rutherford conclude the nucleus to have? positive 16 of 21 In what year did Rutherford make his findings? 1911 17 of 21 How did Bohr suggest electrons were arranged? around the nucleus 18 of 21 In which year did Bohr publish his model? 1913 19 of 21 Whose theory did Bohr build upon? Rutherford 20 of 21 What s the thickness of an atom? 0.000 000 1 mm 21 of 21
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