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Bonding, Structure & Properties
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Cards (246)
Ionic Compounds:
Describe
in terms of
electrons
what happens when
magnesium
reacts with
fluorine
to form the
ionic compound magnesium fluoride
(
MgF2
).
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Explain why
sodium chloride
is NaCl, but
sodium oxide
is Na2O.
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Explain why the ball and stick model is not a true representation of the
structure
of an
ionic compound.
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Ammonia is a liquid between
-77.7
°C and
-33.3°C.
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Use the
kinetic theory
to explain the
three states of matter
in this case.
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Using the particle theory, predict how
temperature
and
pressure
affect the
density
of a
fixed mass
of
gas.
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Explain the
limitations
of the particle theory.
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NaCl has a very
high melting point
, but can be
easily crushed.
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Explain why
ionic
compounds conduct electricity only when
molten
or
dissolved
in
water.
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Suggest how electrolysis can be used to
separate lead selenide
(PbSe).
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Nitrogen gas is a
diatomic
molecule.
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Explain how the
atoms
are
joined together
in
nitrogen gas.
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Explain why the melting point of hydrogen chloride is
-115°C
, whereas sodium chloride’s melting point is
801°C.
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Sulphur hexafluoride SF6 is an
insulating gas.
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Explain the type of bonding present and explain why it is
gaseous
at STP (
Standard Temperature
and
Pressure
).
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Ionic lattices are
brittle.
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Compare and contrast
metallic
and
ionic
bonding to explain why
metallic
compounds are not
brittle.
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Explain, in terms of
structure
and
bonding
why metals are
good conductors
of
heat energy
and
electricity.
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Alloying a
metal
can make the metal
harder.
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Explain the
properties
of
diamond
in terms of its
structure
and
bonding.
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Graphite can be used to
reduce
the
friction
between
two substances.
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Diamond coating
would make
smartphones
and
tablets far stronger
but would remove their
touch-screen capability.
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Sun cream uses
nanoparticles.
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Some scientists believe there should be
restrictions
on the use of
nano particles.
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Explain some of the possible
risks
associated with the use of
nanoparticles.
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Explain how the atoms of
Group 1
and
Group 7 elements react with each other
,
in terms of their electronic structure.
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Explain, using their position in the
periodic table
, what the charges on
metallic
and
non-metallic
ions
relates
to.
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Explain how the
ions
are
held together
in
solid magnesium oxide
(MgO).
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The PiXL Club Ltd, Company number
07321607
, is the
copyright holder
of the resource "
GCSE Chemistry AQA
Topic –
Bonding
,
structure
and the
properties
of
matter
".
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Coarse particles have diameters between
1 x 10-5m
and
2.5 x10-6m.
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Nanoparticles have different
properties
from those for the same
materials
in
bulk
due to their
high surface area
to
volume ratio.
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The uses of nanoparticles include
medicine
,
electronics
,
cosmetics
,
sunscreens
,
deodorants
,
catalysts.
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Nanoparticles
are structures that are
1-100nm
in size, a
few hundred atoms.
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Nanoparticles are
smaller
than
fine particles.
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Graphite
conducts electricity
due to each
carbon
having one
delocalised electron.
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Graphene is a
single layer
of
graphite
,
1 atom thick.
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Fullerenes
are
molecules
of
carbon
atoms with
hollow shapes.
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Graphite has
layers
of
hexagonal rings
and each carbon makes
3 covalent bonds.
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Diamond does not
conduct electricity
due to the lack of
delocalised electrons.
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In a diamond, each carbon makes
4
covalent bonds.
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