All
atoms
have
electrons
.
However
,
the
ones
in
the
last
shell
receive
the
name
of
____________________
electrons
.
This
kind
of
electrons
participate
in
the
formation
of
____________________
bonds
.
These
bonds
maintain
2
or
more
atoms
together
in
order
to
create
a
new
substance
.
If
the
bonded
atoms
are
identical
,
an
____________________
is
created
.
Otherwise
,
a
____________________
is
produced
.
Depending
if
the
bonded
atoms
are
metals
or
non
-
metals
,
we
can
distinguish
____________________
types
of
bonds
:
ionic
,
____________________
,
and
metallic
.
In
ionic
bonding
,
an
electron
is
____________________
from
the
metal
to
the
non
-
metal
.
In
covalent
bonding
,
the
electron
(
s
)
are
____________________
between
the
atoms
.
In
metallic
bonding
,
the
electrons
are
released
by
the
atoms
creating
a
____________________
of
electrons
which
makes
them
excellent
____________________
conductors
.
