Download Atomic Theory and the Evolution of Atomic Structure Democritus and

Atomic Theory and the Evolution of Atomic Structure
Democritus and his “atomos” (460-370 B.C.)
 What is atomos?
 What is the atomos concept?
 What did Democritus hypothesize?
John Dalton’s Atomic Theory (early 1800s) – Five Hypotheses
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J.J. Thompson’s Cathode Tube Experiment (1897)
 What did he do?
 What indirect evidence did he see?
 What did he discover as a result?
 What was his model of the atom called? Picture?
Atomic Theory and the Evolution of Atomic Structure
Rutherford’s Gold Foil Experiment (1911)
 What did he do?
 What indirect evidence did he see?
 What did he discover as a result?
 What was his model of the atom called? Picture?
Neils Bohr - Planetary or Bohr Model of Atom (1913)
 How is Bohr’s model similar to Rutherford’s model?
 What did he conclude about electrons and energy?
What two hypotheses of Dalton’s Theory have been proven incorrect? Explain.
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Old Statement:
1. Corrected Statement:
 Old Statement:
1. Corrected Statement: