1 - Matter
List qualifications for purse substances
one kind of matter
has one definite composition
has definite properties
List the qualifications for mixtures
two or more chemicals
many compositions possible (variable)
properties depend of composition
can be separated by physical means (running a current through)
What are the two types of matter?
pure substances and mixtures
What are the two types of mixtures?
Homogeneous and heterogeneous
What are the two types of pure substances?
Elements and compound.
List the qualifications for homogeneous mixtures.
What does the prefix "homo" mean?
What does the prefix "hetero" mean?
What are the qualifications for heterogeneous mixtures?
non uniform composition
non uniform appearance
distinct parts (phases)
List the qualifications for elements.
cannot be separated or decomposed into other purse substances
contains 1 type of atom
List the qualifications for compounds.
can be separated into other purse substances
contains 2 or more kinds of atom
List the qualifications for physical properties.
Characterize physical states of behavior of something
description by senses (color, shape, odor)
measurable (mp, bp, density)
List the qualifications for chemical properties.
describe the ability of a substance to change into a new substance
list of chemical changes possible
"may react to form.."
List the qualifications for physical changes.
changes of state, but substance remains the same.
New form of old substance
no new substance
What's the difference between chemical change and property?
a chemical property is the potential for a chemical change, a chemical change is when a substance already changed.
1 - Matter