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Chapter 4 Flashcards

(18 cards)

1
Q

What is the smallest unit of an element that maintains the properties of that element?

A

An atom

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2
Q

What is the smallest unit of an element that maintains the properties of that element?

A

An atom

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3
Q

What is a subatomic particle that has a negative charge?

A

An electron

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4
Q

What is in physical science, an atom’s central region, which is made up of protons and neutrons?

A

A nucleus

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5
Q

What is a subatomic particle that has a negative charge?

A

An electron

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6
Q

What is in physical science, an atom’s central region, which is made up of protons and neutrons?

A

A nucleus

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7
Q

What is a region around the nucleus of an atom where electrons are likely to be found?

A

An electron cloud

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8
Q

What is a subatomic particle that has a positive charge and that is found in the nucleus of an atom?

A

A proton

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9
Q

What is a unit of mass that describes the mass of an atom or molecule?

A

An atomic mass unit

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10
Q

What is a subatomic particle that has no charge and that is found in the nucleus?

A

A neutron

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11
Q

What is the number of protons in the nucleus of an atom; the atomic number is the same for all atoms of an element?

A

An atomic number

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12
Q

What is an atom that ha s the same number of protons (or the same atomic number) as other atoms of the same element do but that has a different number of neutrons (and thus a different atomic mass)?

A

An isotope

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13
Q

What is the mass of an atom expressed in atomic mass units?

A

An atomic mass

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14
Q

Who was the scientist who thought you could keep cutting something forever and ever without stopping?

A

Democritus

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15
Q

Who was the scientist who thought atoms of the same element are exactly alike and vise versa?

A

John Dalton

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16
Q

Who was the scientist who experimented with positive and negative coils?

17
Q

Who was the scientist who experimented with gold foil and light beams?

A

Ernest Rutherford

18
Q

Who was the scientist who thought electrons move around the nucleus?