Biology Notes
Biology: Dr. Hensley/ Mrs. Ingram
Date: September 2015
Topic: Properties of Matter
Properties of Matter:
 Takes up space (volume)
 Has mass
Physical Changes of Matter
 What the matter looks like; such as color, texture
 When the state (gas, liquid, solid) or shape changes but the
substance remains the same. Ex: ice, water, water vapor
Chemical Changes of Matter
 How the matter behaves (reacts) chemically; such as flammability
 When one substance becomes something entirely different. Ex:
Uncooked egg heated to become cooked egg. The uncooked egg is
no longer there.
Element
How do
you find
this?
Lithium
Li
Atomic Mass
Larger
number
(more
massive
number) with
decimals that
is the average
of all isotopes
of that
element
Mass #
Atomic
mass that
is
rounded
to the
nearest
whole
number
Atomic #
Smaller
number
for an
element
6.941
7
3
# Protons
Same as
Atomic #
And never
change or
the
element
has
changed
#Neutrons
Mass #
minus
Atomic #
# Electrons
Same as
Atomic #
If neutron
number
changes
then you
have an
isotope
If electron
number
increases or
decreases
you have an
ion
3
4
3