Editing Answers To HW From Greeks To Millikan

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1. Small particle of matter that still retains its properties. 
 
2. He set up a system to keep track of matter, by keeping track of the atom. 
 
3. a) Atoms are the smallest particle of matter (it is indivisible). 
b) Atoms of the same element are identical including mass. 
c) Atoms of different elements are different including mass. 
d) Atoms combine to form compounds in a simple whole number ratio 
 
4. a) atoms are not indivisible (we have subatomic particles) However are still the smallest particles that retain their properties. 
b) There are isotopes 
c) This is correct 
d) This is correct 
 
5. Not only is mass conserved but also total number of atoms and # of each type of atoms are conserved. 
 
6. In a chemical compound, the masses of the elements are always in the same (i.e. fixed) proportion (ratio). 
 
7. Two conclusion: a) there is a negatively charged particle (called an electron) 
b) there is only one type of an electron 
 
8. Plum Pudding (or Plum in Pudding) Model of the Atom, the atom had no charge. 
 
9. Milikian, oil dropping, charge to mass ratio of an electron, exact mass and exact charge of an electron.

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