Atomic Theory Review

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

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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He claimed that matter was made of small, hard particles that he called “atomos.”

• Democritis

• Dalton

• Moseley

• Einstein

The scientist responsible for "discovering" the nucleus is:

• Bohr
• Rutherford
• Schroedinger
• Einstein

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John Dalton stated:

• Atoms are tiny, invisible particles.

• Atoms of one element are all the same.

• Atoms of different elements are different.

• Compounds form by combining atoms.

• All of the statements listed.

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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