CHE1000 - Chapter 1-3

Defintions + nomenclature from Chapter 1-3

chemistry

study of matter and the changes it undergoes

matter

anything that has mass and occupies space

Mass is

independent of location

The two branches of chemistry are:

inorganic and organic

What are the four physical states of matter?

solid, liquid, gas, plasma

What are the two types of solids?

crystalline and amorphous

Solid refers to

crystalline solids

solid

particles touch and it not compressible

Solids have

definite volume and shape

Solid + Heat =

Liquid

Liquid

particles slightly touch and not compressible

Liquids have

indefinite shape and definite volume

Liquid + Heat=

Gas

Gas

particles not touching and very compressible

Gases have

indefinite volume and shape

How can you classify matter?

pure substance or mixture

pure substance

element or compound

mixture

homogenous or heterogenous

compounds

ionic or molecular

Ionic compound contains

metal

qualitative

oberservations

quantitative

numerical data

Scientific Method

1. Wonder

2. Pattern

3. Hypothesis

4. Testing

5. Theory

hypothesis

tentative explanation to account for patterns and observations

Theory

a very well tested hypothesis

Scientific Law

an explanation of a natural phenomena with no known exceptions