Dalton's Atomic Theory
an explination of the structure of matter in terms of different combinations of very small particles
one or two letter notation
positivly charged, central core of atom
negativly charged partical
1897, discovered electron
1909, oil drop experiment
1911, discovered nucleus and gold foil experiment
protons + neutrons in nucleus
an atom based on atomic number & mass number
substance with same atomic number
same atomic number, different mass number
elements in horizontal row
elements in columns
1869, periodic table
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