Unit
4
V ocabulary
PreAp
C hemical
F ormulas
a nd
E quations
1. Chemical
P roperties
-‐
a
p roperty
o r
b ehavior
o f
a
s ubstance
when
i t
u ndergoes
a
c hemical
c hange
o r
r
eaction
2. Matter
-‐
t he
s ubstance
o r
s ubstances
o f
w hich
a ny
p hysical
object
c onsists
o r
i s
c
omposed
3. Element
-‐
a
s ubstance
c onsisting
o f
a toms
w hich
a ll
h ave
t he
same
n umber
o f
p
rotons
4. Compound
-‐
a
s ubstance
f ormed
w hen
t wo
o r
m ore
e lements
are
c hemically
b onded
t
ogether.
5. Balanced
c hemical
e quation
–
t he
n umbers
o f
a toms
o f
e ach
element
a re
e qual
i n
t he
p roduct(s)
a nd
r eactants
o f
a
c hemical
equation
6. Chemical
c hange
–
t he
f ormation
o f
a
n ew
s ubstance
w ith
different
p roperties;
c annot
b e
u ndone
b y
p hysical
m eans
7. Chemical
e quation
–
a
r epresentation
o f
a
c hemical
r eaction
by
s ymbols
a nd
n umbers
8. Chemical
f ormula
–
a
r epresentation
o f
a
s ubstance
i n
w hich
the
e lements
a re
r epresented
b y
t heir
s ymbols
a nd
s ubscripts
represent
t he
n umber
o f
a toms
o f
e ach
e lement
9. Chemical
r eaction
–
a
c hange
c aused
b y
t he
i nteraction
o f
t wo
or
m ore
s ubstances
( reactants)
r esulting
i n
t he
f ormation
o f
new
s ubstances
( products)
10.
Coefficient
–
t he
n umber
p laced
i n
f ront
o f
a
c hemical
formula
i n
a
c hemical
e quation;
r epresents
t he
n umber
o f
molecules
o f
t hat
s ubstance
11.
Law
o f
c onservation
o f
m ass
–
m atter
i s
n ot
c reated
o r
destroyed;
o nly
r earranged
12.
Precipitate
–
t he
f ormation
o f
s olids
f rom
a
s olution
13.
Product
–
s ubstance(s)
r esulting
f rom
a
c hemical
r eaction
14.
Reactant
–
s ubstances
t hat
a re
c ombined
a nd
c hanged
during
a
c hemical
r eaction
15.
Subscript
–
t he
n umber
w ritten
t o
t he
r ight
a nd
s lightly
below
a n
e lement
i n
a
c hemical
f ormula;
r epresents
t he
number
o f
a toms
o f
a n
e lement
p resent
i n
a
c hemical
f ormula
16.
Yield
–
t he
q uantity
o f
p roduct
f ormed
a s
a
r esult
o f
a
chemical
r eaction