Atomic Theory

What did Thomson's atomic theory model look like?

• A ring with gold foil in the middle.

• Electrons orbiting the nucleus like the planets around the sun.

• A cloud of electrons floating around the nucleus.

• A scoop of chocolate chip ice cream. It had electrons scattered within a ball of positive charge.

What did Bohr's atomic theory model look like?

• A ring with gold foil in the middle.

• Electrons orbiting the nucleus like the planets around the sun.

• A cloud of electrons floating around the nucleus.

• A scoop of chocolate chip ice cream. It had electrons scattered within a ball of positive charge.

The cloud model is what we use for the atomic theory now. What does the cloud model look like?

• A ring with gold foil in the middle.

• Electrons orbiting the nucleus like the planets around the sun.

• A cloud of electrons floating around the nucleus.

• A scoop of chocolate chip ice cream. It had electrons scattered within a ball of positive charge.

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What did Rutherford discover about atoms?

• An atom is always negatively charged.

• An atom is mostly empty space, but has a dense positively charged center(nucleus).

• An atom is always positively charged.

• All particles will pass straight through gold foil with no change in path.

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What is a positively charged particle?

• neutron

• electron

• proton

• atom

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What is a negatively charged particle?

• neutron

• electron

• proton

• atom

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What is a particle with no charge?

• neutron

• electron

• proton

• atom

Who discover the electron?

• Dalton

• Rutherford

• Thomson

• Bohr

What did Rutherford discover in his experiment?

• nucleus

• electrons

• neutrons

• quarks

Who proposed a model with electrons moving in specific layers?

• Dalton

• Rutherford

• Bohr

• Thomson