Atomic Model Review Chemistry Mr. Wignall
List the 6 scientists in order of their discoveries.
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Democritus John Dalton JJ Thomson Ernest Rutherford Neils Bohr James Chadwick
Now, briefly describe what each scientist discovered
Democritus John Dalton JJ Thomson Ernest Rutherford Neils Bohr James Chadwick
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Democritus John Dalton JJ Thomson Ernest Rutherford Neils Bohr Matter was made of little, indivisible spheres called “atomos” John Dalton “Atomic theory”—diff elements have diff masses, properties, etc JJ Thomson Discovered the electron. “plum pudding” model Ernest Rutherford Discovered the nucleus and it was positively charged. Electrons orbited around it Neils Bohr Only certain orbits were allowed. No “in between” orbits (quantized) James Chadwick Discovered the neutron (no charge) in the nucleus
Draw what an atom looks like, labeling the charge on each subatomic particle (-, 0, +)