chemistry
exam one
20
:
Chapter
multiple choice
one & two
cate nature t rubes sor
SIGNIFICANT
↳
FIGURES
foundations
--
matter is anything that has mass and takes up space
"all non-zero #'s are significant
zu
378(3)
stomsarethe
·
consists atom a is
Of =
2)
atoms and molecules
in motion of
matter
molecules all zeros in between two non-zero #s are significant
20 . 0098(6)
3)
-
a zero at the end of a decimal # is significant
limit
16 00 . (4)
4)
pure substance vs . mixtures o zeros at the
beginning of the decimal #are / significant
a
&
2
S
heterogeneous
-
5)
0 003
. (1)
zeros to the right or after non-zero digit with no decimal
V
homogeneous water
e
elements compounds salt water
Cu , Al NaCI , HzO
sand
melting, are not significant 2500(2)
TEMPERATURE
&
unversoll
laws
changes of state
k
=
Tz +
243 15 .
*
The law of conservation of mass
=
Le the total mass remains constant
TF (1 8 Tc) = · +
32
desistance
.
volume.
=
ITF 32) -
C
1 8 * The law definite
·
.
of proportions
Le , all have
samples of a compound a
fixed proportion
in order to have a chemical reaction :
original
·
bond broken &The law of multiple proportions
2 two or more compounds form of
may
↑
new bond formed the same two elements
-
law of conservation of mass kept
isotopera
element
↓ A =
mass number
lamu # of protons and neutrons
·
neutrons net charge of o ·
exact number
I amu
protons z =
atomic number
mass is neglectable · # of protons
· electrons ·
exact number
·
atomic is
·
mass of all
an
average
·
# of protons identify the elements occurring isotopes
celement's social security #)
(measured number(
·
neutrons contribute to the mass
·
electrons stabilize the charges
metalloids
·
know the
Es we charges for
B 1+ 2+ 37
· groups IA ,
2A ,
3A *
Si
metals Yn
*
,
Cd2 +
Ge AS *
group one :
alkali metals
Ag I +
writing
>
chemical formulas group two :
alkaline earth metals
Sb Te nonmetals
1) the in cation ,
order the Formula ,
first the group seven halogens
:
At
and the anion group eight :
noble gases
-
electronegativity increases
2) know associated with and
the charges each cation as you move to the
-
anion ↑
right and up
3) the
adjust subscripts to get the total charge of metallic character
-
O decreases as you move
↑ and-
exam one
20
:
Chapter
multiple choice
one & two
cate nature t rubes sor
SIGNIFICANT
↳
FIGURES
foundations
--
matter is anything that has mass and takes up space
"all non-zero #'s are significant
zu
378(3)
stomsarethe
·
consists atom a is
Of =
2)
atoms and molecules
in motion of
matter
molecules all zeros in between two non-zero #s are significant
20 . 0098(6)
3)
-
a zero at the end of a decimal # is significant
limit
16 00 . (4)
4)
pure substance vs . mixtures o zeros at the
beginning of the decimal #are / significant
a
&
2
S
heterogeneous
-
5)
0 003
. (1)
zeros to the right or after non-zero digit with no decimal
V
homogeneous water
e
elements compounds salt water
Cu , Al NaCI , HzO
sand
melting, are not significant 2500(2)
TEMPERATURE
&
unversoll
laws
changes of state
k
=
Tz +
243 15 .
*
The law of conservation of mass
=
Le the total mass remains constant
TF (1 8 Tc) = · +
32
desistance
.
volume.
=
ITF 32) -
C
1 8 * The law definite
·
.
of proportions
Le , all have
samples of a compound a
fixed proportion
in order to have a chemical reaction :
original
·
bond broken &The law of multiple proportions
2 two or more compounds form of
may
↑
new bond formed the same two elements
-
law of conservation of mass kept
isotopera
element
↓ A =
mass number
lamu # of protons and neutrons
·
neutrons net charge of o ·
exact number
I amu
protons z =
atomic number
mass is neglectable · # of protons
· electrons ·
exact number
·
atomic is
·
mass of all
an
average
·
# of protons identify the elements occurring isotopes
celement's social security #)
(measured number(
·
neutrons contribute to the mass
·
electrons stabilize the charges
metalloids
·
know the
Es we charges for
B 1+ 2+ 37
· groups IA ,
2A ,
3A *
Si
metals Yn
*
,
Cd2 +
Ge AS *
group one :
alkali metals
Ag I +
writing
>
chemical formulas group two :
alkaline earth metals
Sb Te nonmetals
1) the in cation ,
order the Formula ,
first the group seven halogens
:
At
and the anion group eight :
noble gases
-
electronegativity increases
2) know associated with and
the charges each cation as you move to the
-
anion ↑
right and up
3) the
adjust subscripts to get the total charge of metallic character
-
O decreases as you move
↑ and-
