Models of the Atom

This particle was the first subatomic particle discovered, leading science to discard Dalton's model of the atom.

• electron

• proton

• neutron

• photon

What can you conclude from the fact that scientists continue to update the atomic model?

• New information about atoms continues to be discovered.

• Old information about atoms is completely useless.

• Scientists did not have any information about atoms until a few years ago.

• Scientists still have no idea what atoms look like.

Place the atomic theories in the order in which they were published.

• D;B;A;C;E

• D;B;E;A;C

• D;B;A;E;C

• D;A;B;C;E

How are electrons arranged in an atom?

• In groups of five

• In energy levels

• By color

• By shape

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Ernest Rutherford’s model of the atom was

• Solid, indivisible spheres.

• A positive sphere with smaller negative spheres inside of it.

• A dense, positive nucleus with electrons orbiting around it.

• A mixture of protons and neutrons surrounded by electrons in energy levels.

John Dalton’s model of the atom was

• Solid, indivisible spheres.

• A positive sphere with smaller negative spheres inside of it.

• A dense, positive nucleus with electrons orbiting around it.

• A mixture of protons and neutrons surrounded by electrons in energy levels.

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J.J. Thomson’s model of the atom was

• Solid, indivisible spheres.

• A positive sphere with smaller negative spheres inside of it.

• A dense, positive nucleus with electrons orbiting around it.

• A mixture of protons and neutrons surrounded by electrons in energy levels.

Chadwick’s model of the atom was

• Solid, indivisible spheres.

• A positive sphere with smaller negative spheres inside of it.

• A dense, positive nucleus with electrons orbiting around it.

• A mixture of protons and neutrons surrounded by electrons in energy levels.

What are the two subatomic particles that are in the nucleus of an atom?

• Electrons and neutrons

• Protons and neutrons

• Electrons and protons

• Megatrons and optimons

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Which model of the atom was the first to introduce the concept of a nucleus?

• Dalton's model

• Thomson's model

• Rutherford's model

• Bohr's model

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DOK Level 1: Recall