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chapter 1- introduction to matter Flashcards

(25 cards)

1
Q

what is chemistry

A

the study of the properties of matter and how matter changes

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2
Q

what are elements

A

a substance that cannot be broken down into any other substances by chemical or physical means

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3
Q

what are elements called

A

the building blocks of matter

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4
Q

what are atoms

A

tiny particles that make up an element

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5
Q

what is a symbol

A

a one-or-two-letter set of characters used to identify an element

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6
Q

what is a compound

A

a substance made up of 2 or more elements chemically combined in a specific ratio

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7
Q

what is a formula

A

a combination of symbols that shows the ratio of elements in a compound

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8
Q

what is a mixture

A

made from 2 or more substances- elements, compounds, or both- that are together in the same place but do not make a new substance

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9
Q

physical change

A

a change that alters the form or appearance of a material but dies not change the material into a new substance

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10
Q

what is a chemical change or reaction

A

a change in matter that produces a new substance

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11
Q

what are the two ways that matter can change

A

physical and chemical changes

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12
Q

what is matter

A

anything that has mass and takes up space

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13
Q

what is weight

A

a measure of the force of gravity on you

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14
Q

what is mass

A

the measurement of how much matter an object contains

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15
Q

what is the unit to measure mass

A

grams

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16
Q

what is volume

A

the amount of space that matter occupies

17
Q

what is the formula for volume

18
Q

what is density

A

the measurement of how much mass is contained in a given volume

19
Q

what is the formula for density

20
Q

who is democritus

A

credited to be the first to think matter is formed of small pieces he called it atoms

21
Q

dalton test his ideas

22
Q

can atoms be broken down into smaller pieces

23
Q

are all atoms alike in an element

24
Q

what is a chemical bond

A

the force that holds atoms together

25
molecule
a combination of two or more atoms bonded together