The Structure of Atoms

Thompson was the first to discover a subatomic particle - the electron. What are the others?

• neutrons & positrons

• protons & neutrons

• positrons & quarks

• protons & positrons

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NGSS.MS-PS1-1

A positively charged particle found in the nucleus is called a

• neutron.

• proton.

• electron.

• positron.

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NGSS.MS-PS1-1

Electrons can best be described as having a

• large size, positive charge.

• very small size, positive charge.

• large size, negative charge.

• very small size, negative charge.

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NGSS.MS-PS1-1

NGSS.MS-PS2-3

Electrons are subatomic particles that exist

• inside the nucleus.

• in simultaneous dimensions.

• in parallel universes.

• outside the nucleus.

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NGSS.MS-PS1-1

Neutrons (discovered by James Chadwick in 1932) are neutral subatomic particles that are located

• in and outside the nucleus.

• in the nucleus.

• just outside the nucleus.

• in alternate universes.

Tags

NGSS.MS-PS1-1

Neutrons have almost exactly the same mass as

• electrons.

• positrons.

• protons.

• quarks.

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NGSS.MS-PS1-1

Only protons & neutrons can be distinguished by mass, charge and position in an atom.

• True

• False

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NGSS.MS-PS1-1

James Dalton proved that the true nature of the atom could best be described as resembling "plum pudding."

• True

• False

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NGSS.MS-PS1-1

Rutherford proved the existence of protons located in a very small nucleus by using a crude particle accelerator in 1911.

• True

• False

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NGSS.HS-PS1-8

The atomic number (#) of an element is equal to the

• weight of an electron.

• # of neutrons in a single atom of that element.

• weight of a neutron.

• # of protons in a single atom of that element.

Tags

NGSS.MS-PS1-1