Atomic Theory

Electron cloud is based on

• Quantum Mechanics
• Gold Foil Experiment
• Matter is made up of small particles called atoms
• Nuclear Theory

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He developed the planetary model of the atom.

• Rutherford
• Bohr
• Chadwick
• Dalton

What did Thomson discover?

• electron
• proton
• neutron
• electron cloud

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

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Subatomic particles that are neutral in charge

• Neutrons
• Protons
• Nucleus 
• Electrons

A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

• Electron Shells
• Orbitals
• Electron Cloud
• Nucleus

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Where electrons are likely to be found as they travel around the nucleus

• Nucleus
• Electron Cloud
• Within a Proton
• Within a Neutron

The scientist responsible for "discovering" the nucleus is:

• Bohr
• Rutherford
• Schroedinger
• Einstein

Rutherford's gold foil experiment provided evidence that...

• Negative and positive charges are spread evenly throughout the atom.
• Alpha particles have a positive charge.
• Gold is not a dense as previously thought.
• There is a dense positively charged nucleus at the center of an atom.

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