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atomic Structure > atoms > Flashcards

atoms Flashcards

1
Q

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

A

Atom

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2
Q

True or False: Atoms are composed of protons, neutrons, and electrons.

A

True

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3
Q

What is the positively charged subatomic particle found in the nucleus of an atom?

A

Proton

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4
Q

Fill in the blank: Electrons have a ________ charge.

A

Negative

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5
Q

What is the neutral subatomic particle found in the nucleus of an atom?

A

Neutron

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6
Q

True or False: The number of protons in an atom determines its atomic number.

A

True

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7
Q

What is the total number of protons and neutrons in the nucleus of an atom?

A

Atomic mass

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8
Q

Fill in the blank: The ________ of an atom is the total number of protons in its nucleus.

A

Atomic number

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9
Q

What is the region around the nucleus where electrons are most likely to be found?

A

Electron cloud

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10
Q

True or False: Electrons have a much larger mass than protons and neutrons.

A

False

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11
Q

What is the charge of a neutron?

A

Neutral

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12
Q

Fill in the blank: The ________ of an atom is the sum of its protons and neutrons.

A

Atomic mass

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13
Q

What is the name of the theory that describes the behavior of electrons in atoms?

A

Quantum mechanics

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14
Q

True or False: Isotopes of an element have the same number of protons but different numbers of neutrons.

A

True

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15
Q

What is the SI unit used to measure atomic mass?

A

Atomic mass unit (amu)

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16
Q

Fill in the blank: The ________ is the central part of an atom that contains protons and neutrons.

A

Nucleus

17
Q

What is the term for atoms of the same element with different numbers of neutrons?

A

Isotopes

18
Q

True or False: Electrons in an atom can exist in any energy level.

A

True

19
Q

What is the maximum number of electrons that can occupy the first energy level of an atom?

A

2

20
Q

Fill in the blank: The ________ is the smallest particle of an element that retains the properties of that element.

A

Atom

21
Q

What is the term for the number of protons in the nucleus of an atom?

A

Atomic number

22
Q

True or False: Electrons in the outermost energy level of an atom are called valence electrons.

A

True

23
Q

What is the term for the total number of protons and neutrons in the nucleus of an atom?

A

Atomic mass

24
Q

Fill in the blank: The ________ is the region around the nucleus where electrons are most likely to be found.

A

Electron cloud

atomic Structure (4 decks)

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