Atomic Theory

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.

Tags

NGSS.MS-PS1-1

Who came up with this model of an atom?

• J.J. Thompson
• Ernest Rutherford
• Neils Bohr
• James Chadwick

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NGSS.MS-PS1-1

True or False: The majority of an atom is made up of empty space

• True
• False

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NGSS.MS-PS1-1

Contributes basically no mass to an atom.

• protons
• neutrons
• electrons
• protons and neutrons

The atomic number for Oxygen is 8, so

• there are 8 protons in the atom
• the atomic mass is less than 8
• the mass of the atom is 8
• the atom is decaying

Rutherford concluded that the atom

• has a nucleus with a positive charge
• has a nucleus with a negative charge 
• is a small mass with negative and positive charges
• contains a nucleus without a charge

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NGSS.HS-PS1-8

What is the difference between the Electron Cloud Model and the Bohr Model

• placement of the electrons
• placement of the neutrons
• placement of protons
• Bohr model did not include a nucleus

Discoverer of the neutron?

• Jimmy
• Chadwick
• Charleston
• Rutherford

In the current atomic theory, where are electrons likely to be found?

• Specific Orbits, like planets around a star
• In the nucleus
• In the electron cloud
• electrons are not part of the current atomic theory

Tags

NGSS.MS-PS1-1

In the current atomic theory, where are electrons likely to be found?

• Specific Orbits, like planets around a star
• In the nucleus
• In the electron cloud
• electrons are not part of the current atomic theory

Tags

NGSS.MS-PS1-1