History and Parts of the Atom

The neutral subatomic particle of an atom.

• Proton

• Neutron

• Nucleon

• Electron

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The center of the atom.

• Electron Cloud

• Energy Levels

• Nucleus

• Orbitals

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The negative subatomic particle of an atom.

• Proton

• Neutron

• Nucleon

• Electron

The positive subatomic particle of an atom.

• Proton

• Neutron

• Nucleon

• Electron

He designed the original atomic theory of matter. His model is sometime referred to the Billiard Ball or Bowling Ball Model.

• Bohr

• Dalton

• Rutherford

• Thompson

The smallest particle of an element that retains the chemical identity of that element.

• Anode

• Cathode

• Electron

• Atom

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Discovered the neutron.

• Thomson

• Chadwick

• Millikan

• Rutherford

Discovered the electron using cathode ray tube. His model of the atom was called the Plum Pudding Model of the atom.

• Bohr

• Millikan

• Thomson

• Rutherford

He determined that all atoms have a tiny dense nucleus containing protons and the atom was mainly empty space with the Gold Foil Experiment.

• Bohr

• Millikan

• Thomson

• Rutherford

Dalton's atomic theory did NOT include the postulate that

• Matter is made of small particles called atoms

• Atoms contain electrons protons and neutrons

• Atoms are neither created nor destroyed in a chemical reaction

• Compounds always contain the same relative numbers and kinds of atoms

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