SUMMARY OF TEXTBOOK (PAGE25-39)!!

Summary of Chapter 2: Finding out about Matter
Thesis: anything that has mass the takes up space is called matter.

Matter can be basically divided into two majoy groups: pure substance & mixture
Division 1: Pure substance: one set of properties & one kind of particle
elements and compounds are examples of pure substance

Division 2: Mixture: more than one set of properties and substances & physically combined
homogeneous and heterogeneous are examples of mixture 

Physical & Chemical Changes:
Physical change: no new substance is formed
Chemical change: new substance is formed

Characters of Pure Substance:
Pure substance has a constant boiling point
The temperature at which a liquid changes to a solid is called its freezing point while the opposite is melting point

Compounds & Elements:
Pure substance that can be decomposed into new knids of matter are called compounds
The elemental building blocks of all kinds of matter and are called elements

Compounds Have a Definite Composition:
The compounds will have a definite composition which is the different between mixture of elements and compounds of elements------this fact is called the Law of Definite Composition


Matter Is Made of Atom

Atom:
The word atom means this smallest possible piece of something

Element:
Particles made of more than one atom are called molecules

Compound:
particles joining together to form one new particle with different or same property