Section 2.1 What is Matter?
List the two types of pure substances
1. elements 2. compounds
Name two examples of mixtures
1. grape juice 2. air
Name two examples of pure substances
1. water 2. salt
What is the chemical formula for water
H20
Why is light not matter
Light does not have mass or volume
mixture
a combination of more than one pure substance
compound
a substance made of atoms of more than one element bound together
element
a substance that cannot be broken down into simpler substances
pure substance
any matter that has a fixed compostion and definite properties
matter
anything that has mass and occupies space.
heterogenous mixture
combination of substances in which the particles are not uniformly distributed and are large enough to be seen easily
miscible
describes two or more liquids that are able to dissolve into each other in various proportions
immiscible
describes two or more liquids that do not mix into each other
chemical formula
the chemical symbols and numbers indicating the atoms contained in the basic unit of a substance
atom
the smallest particle that has the properties of an element
molecule
the smallest unit of a substance that exhibits all of the properties characteristic of that substance
chemistry
the study of matter and how it changes
homogeneous mixture
well mixed, same throughout, cannot see particles