Questions asked by Danielle

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• How did Rutherford revise the plum-pudding model of the atom? And why did he do that?
  
• Why did Thomson change Dalton's model of the atom? What did he propose as an alternative?
  
• How is the modern periodic table different from the table Mendeleev proposed?
  
• What does an elements column number tell you about the atomic structure?
  
• At what temperature is water the most dense? Why is this the case with water, but not other substances?