Chapter 1

Question 0

Molecules

Answer 0

Two or more atoms joined together in specific shapes

Question 1

Atoms

Answer 1

The infinitely small building block of matter

Question 2

Pure Substance

Answer 2

Matter that has distinct properties and a composition that does not vary from sample to sample

Question 3

Elements

Answer 3

Substances that cannot be decomposed into simpler substances

Question 4

Compounds

Answer 4

Substances composed of two or more elements; contain two or more elements

Question 5

Mixtures

Answer 5

Combinations of two or more substances in which each substance retains its chemical identity

Question 6

Physical Properties

Answer 6

Can be observed without changing the identity and composition of the substance

Question 7

Chemical Property

Answer 7

Describes the way a substance may change, or react, to form other substances

Question 8

Intensive Properties

Answer 8

Do not depend on the amount of sample being examined and are useful in chemistry because they can be used to identify substances

Question 9

Extensive Properties

Answer 9

Depend on the amount if substance; ex. mass and volume

Question 10

Physical Change

Answer 10

When a substance changes its appearance but not composition; ex. ripping paper

Question 11

Chemical Change/Reaction

Answer 11

A substance is transformed into a chemically different substance

Question 12

Precision

Answer 12

Measure of how closely individual measurements agree with each other

Question 13

Accuracy

Answer 13

refers to how closely individual measurements agree with the correct value