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Models of the Atom Humans Try Lots Of Ideas

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Page 1: Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,

Models of the Atom

Humans Try Lots Of Ideas

Page 2: Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,

A Greek philosopher, Democritus, lived about 2500 years ago.

He suggested that matter cannot be divided indefinitely, but must have a smallest entity.

He called this smallest entity the ATOM.

ATOMA = indivisible

Page 3: Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,

Dalton

• Took Democritus’s theory and added scientific data

• An element is composed of the same atoms

• All elements are made out of different atoms

• Each type of atom has a certain mass, size and chemical behavior

Page 4: Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,

J.J. Thompson: Found the Electron

Before the discovery of the nucleus. The main part of the atom had a positive charge and then there were negative charges scattered throughout

Page 5: Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,

The “Marsden” Experiment

Ernest Rutherford

Page 6: Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,

Difference between Plum Pudding and the Rutherford Model

Page 7: Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,

Neils Bohr

Page 8: Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,

Light can excite electrons around atoms and this gives rise to “quantum levels”.

http://online.cctt.org/physicslab/content/applets/JavaPhysMath/java/atomphoton/index.html
Page 9: Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,
Page 10: Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,

Prince Louis' full name is Louis Victor Pierre Raymond duc de Broglie

Page 11: Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,
Page 12: Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,
Page 13: Models of the Atom Humans Try Lots Of Ideas. A Greek philosopher, Democritus, lived about 2500 years ago. He suggested that matter cannot be divided indefinitely,

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