Chapter 1

Question 0

Quantitative Statement

Answer 0

-

Question 1

Qualitative Statement

Answer 1

-Simple statement
-Perceived through senses
-Factual-not subject to interpretation
Ex)The candle is soft and can be cut by a knife.

Question 2

What is Chemistry?

Answer 2

Study of matter, its composition and change, and the energy effects that accompany these changes.

Question 3

The Scientific Method

Answer 3

The process followed by a scientist in trying to explain the changes taking place in the universe.

Question 4

Step 1 of SM

Answer 4

Observation- statement of what is perceived through the senses. The recording of observations is done by performing experiments. Can be qualitative or quantitative.

Question 5

Step 2 of SM

Answer 5

Search for regularities(patterns).

Question 6

Step 3 of SM

Answer 6

Propose a Hypothesis

Question 7

Step 4 of SM

Answer 7

Teat hypothesis through further experimentation.

Question 8

Step 5 of SM

Answer 8

Formulate a theory.

Question 9

Law?

Answer 9

Statements of natural phenomena to which there are no exceptions.

Question 10

Hypothesis?

Answer 10

A tentative explanation of the facts that can be tested further.

Question 11

Theory?

Answer 11

A well-tested hypothesis. It cannot be proven and is accepted on faith.

Question 12

Model system?

Answer 12

A real system that correlates well with the theory. (Helps us understand it.)
Ex) Cricket and Baseball
Ex)Polo and Hockey

Question 13

Solids

Answer 13

• def shape
• def volume
• essentially incompressible
• particles tightly packed
• particles held together by strong forces of attraction

Question 14

Crystalline solids

Answer 14

Exist in regular, repeating, 3D geometric patterns

Question 15

Amorphous Solids

Answer 15

Does not have any regular, internal, geometric pattern

Question 16

Liquids

Answer 16

• no def shape
• def volume
• slightly compressible
• particles are mobile and move around each other
• particles held with weak forces of attraction

Question 17

Gas

Answer 17

• no def shape
• no def volume
• very easily compressible
• particles are far apart and small compared to the space they occupy.
• attractive forces are sobweak that the particles are independent of each other.

Question 18

Phase- gas

Answer 18

State of complete disorder

Question 19

Phase-Liquid

Answer 19

Partial order

Question 20

Phase-solid

Answer 20

Complete order

Question 21

Matter

Answer 21

Anything with volume and mass

Question 22

Volume

Answer 22

Measure of amount of space occupied by object

Question 23

Mass

Answer 23

A measure of the quantity of matter contained in an object

Question 24

Weight

Answer 24

Measure of pull of gravity on an object

Question 25

Substance-

Answer 25

matter that is uniform through out and has a constant composition. It contains one kind of matter
-an element , compound, also called pure substance

Question 26

Element

Answer 26

Substance whose particles/molecules are made of like atoms. These may or may not be molecules. (117 of em)

Question 27

Compounds

Answer 27

• substance whose particles are made of unlike atoms
• These may or may not be molecules
• uniform compostions
• millions

Question 28

Mixtures

Answer 28

Form of matter made up of 2 or more substances that retain their properties.
Hetero or homo

Question 29

Heterogenous mixture

Answer 29

Not uniformly mixed

Question 30

Homogenous

Answer 30

Uniformly mixed, also called solutions, and alloys are solid solutions