When
starting
a
Lewis
structure
,
1
electron
is
placed
on
each
____________________
of
the
element
symbol
.
Only
when
more
than
____________________
electrons
need
to
be
shown
will
there
be
pairs
of
electrons
on
a
side
of
the
element
symbol
.
Each
single
bond
(
one
line
)
contains
____________________
electrons
.
In
the
compound
CCl4
,
carbon
can
make
four
bonds
because
it
has
four
____________________
____________________
.
Each
chlorine
will
make
____________________
bond
with
the
carbon
in
order
to
satisfy
its
____________________
.
In
the
compounds
NH3
,
there
is
one
____________________
____________________
because
the
nitrogen
atom
starts
with
____________________
valence
electrons
and
only
____________________
of
them
are
in
bonds
.
Hydrogen
is
satisfied
with
only
1
bond
to
nitrogen
because
it
only
needs
2
____________________
to
have
a
filled
valence
shell
.
In
N2
,
the
nitrogens
will
be
attached
by
a
____________________
bond
;
this
satisfies
their
octet
because
they
started
with
5
valence
electrons
and
gained
another
3
in
the
bonds
.
When
a
compound
has
an
overall
negative
charge
it
indicates
that
there
are
____________________
electrons
in
the
Lewis
structure
than
the
valence
electrons
the
atoms
started
with
.
In
the
water
molecule
(
H2O
)
there
are
2
lone
pairs
on
the
____________________
atom
.
____________________
and
____________________
commonly
exceed
an
octet
,
meaning
they
can
have
more
than
____________________
electrons
.
In
O2
,
the
oxygens
will
be
attached
by
a
____________________
bond
;
this
satisfies
their
octet
because
they
started
with
6
valence
electrons
and
gained
another
2
in
the
bonds
.
