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Topic C2
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Metallic Bonding
Chemistry > Topic C2
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polymers and giant covalent Structures
Chemistry > Topic C2
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Simple molecular substances
Chemistry > Topic C2
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Cards (31)
Formations of ions:
Ions
are made when electrons are transferred
When
metals
form ions, they
loose
electrons to form
positive
ions (
cations
)
when non-metals form ions they gain electrons to form
negative
ions (
anions
)
Ionic Bonding
Transfer
of
electrons
non-metal
reacting with a
Metal
metal
gives electron to non - metal Creating a
negative
ion
Ionic compound Structure:
ionic compounds
are in a
giant ionic lattice
The
ions
form a
regular lattice arrangement
and there are
Strong electrostatic forces
of
attraction
Ionic compound properties :
high
melting and boiling points due to their
Strong
bonds
can only conduct electricity when
Melted
or
dissolved
in
water
as this is the only time the
ions
are free to
move
Covalent Bonding:
When
non-metals
bond together
strong
bonds
only
electrons
in
outer
shells are
Shared
How to draw Covalent bonds:
Dot
and
cross
diagrams.
These show the
electrons
by drawing them in the
overlap
between the
outer
shells of the
atons
Displayed
formula
This shows the covalent bonds by
lines
between letters of the atoms. Its good for
large
molecules
solids:
strong
forces of
attraction
holding them close together forming a very
regular lattice arrangement
the
particles
don't move from their
positions
so keep a
definite shape
Vibrate about the
positions
liquids:
weak force
ot attraction between the particles
randomly
arranged and are
free
to
move
past eachother
definite volume
,
no definite shape
particles
Constantly moving randomly
Gases:
very
weak force
of attraction,
particles
free to move
move in
straight lines
no definite
shape
or
volume
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