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Chem 101 > Matter > Flashcards

Matter Flashcards

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1
Q

What is matter?

A

Anything that has mass and takes up space.

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2
Q

True or False: Matter can exist in solid, liquid, and gas states.

A

True

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3
Q

What is an atom?

A

The basic unit of matter.

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4
Q

Fill in the blank: Atoms are made up of protons, neutrons, and ____.

A

electrons

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5
Q

What is the atomic number of an element?

A

The number of protons in the nucleus of an atom.

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6
Q

What is a molecule?

A

A group of atoms bonded together.

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7
Q

What is the difference between an element and a compound?

A

An element is made of only one type of atom, while a compound is made of two or more different types of atoms bonded together.

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8
Q

True or False: A mixture is a combination of two or more pure substances.

A

True

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9
Q

What is a physical change?

A

A change in the form of matter without changing its chemical composition.

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10
Q

What is a chemical change?

A

A change that results in the formation of new substances with new properties.

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11
Q

Fill in the blank: The law of conservation of ____ states that matter cannot be created or destroyed in a chemical reaction.

A

mass

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12
Q

What is density?

A

The mass of a substance per unit volume.

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13
Q

True or False: Density is a physical property of matter.

A

True

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14
Q

What is a physical property of matter?

A

A characteristic that can be observed or measured without changing the identity of the substance.

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15
Q

What is a chemical property of matter?

A

A characteristic that describes the ability of a substance to undergo a chemical change.

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16
Q

Fill in the blank: The ____ of matter refers to its resistance to change in motion.

A

inertia

17
Q

What is the law of definite proportions?

A

A compound always contains the same elements in certain definite proportions by mass.

18
Q

What is the law of multiple proportions?

A

When two elements form more than one compound, the ratios of the masses of the second element that combine with a fixed mass of the first element can be reduced to small whole numbers.

19
Q

True or False: Matter can be classified as pure substances or mixtures.

A

True

20
Q

What is an example of a pure substance?

A

Element or compound

21
Q

What is an example of a mixture?

A

Saltwater

22
Q

What is the difference between a homogeneous and a heterogeneous mixture?

A

A homogeneous mixture has uniform composition throughout, while a heterogeneous mixture does not.

23
Q

What is a solution?

A

A homogeneous mixture of two or more substances.

24
Q

What is a suspension?

A

A heterogeneous mixture in which particles settle out upon standing.

25
Q

What is a colloid?

A

A heterogeneous mixture of intermediate particle size between solutions and suspensions.

26
Q

Fill in the blank: A ____ is a substance that cannot be broken down into simpler substances by chemical means.

A

element

27
Q

What is a compound?

A

A substance made of two or more elements chemically combined.

28
Q

True or False: Compounds have different properties from the elements that make them up.

A

True

Chem 101 (1 decks)

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