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Chemistry paper 1
Metallic bonding
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Cards (18)
What is the type of bonding present in metals?
Metallic bonding
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What is the structure of a metal?
Giant
metallic
structure
Positively charged
metal ions
Delocalised
electrons
Strong
electrostatic
forces of attraction
Metallic bonds act in all directions
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Why do most
metals
have high melting and boiling points?
They have strong
metallic bonds
that require a lot of energy to break.
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Why can
metals
conduct electricity?
Because they have
delocalised electrons
that move freely and carry a charge.
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Why are
alloys
less malleable than pure metals?
Alloys have different sized
ions
that form
distorted
layers, making them harder to slide over each other.
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What charge do
metal ions
have?
Positive
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What is the force that holds
metal ions
and
delocalised electrons
together?
Electrostatic attraction
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What does
malleable
mean in the context of pure metals?
It means the metal can be bent into different shapes.
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How are
metallic
and
ionic
structures similar?
Both have
giant
structures.
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What are the properties of metals related to their structure?
High melting and boiling points due to strong
metallic bonds
Good electrical conductivity due to
delocalised electrons
Malleability
due to layers of ions that can slide over each other
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Why does pure iron have a melting point of
1538
°C?
Because it is a
giant metallic structure
with many strong
metallic bonds
that require a lot of energy to break.
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What allows
metals
to conduct electricity effectively?
The presence of
delocalised electrons
that carry a charge through the structure.
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What is the difference in structure between pure metals and
alloys
?
Pure metals
have
ions
of the same size arranged in regular layers.
Alloys have different sized ions that form distorted layers.
Pure metals are more
malleable
, while alloys are less malleable and harder.
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What type of bonding is present in
aluminium
?
Metallic bonding
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Describe the structure of
aluminium
.
Aluminium has a giant structure with positive aluminium ions and
delocalised
electrons.
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What are the names of particles X and Y in the structure of
aluminium
?
X is the aluminium
ion
and Y is the
delocalised
electron
.
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Why is it possible to bend a piece of
aluminium
?
Because aluminium
ions
are the same size, allowing layers to slide easily over each other.
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What are the characteristics of
metallic bonding
?
Strong
electrostatic forces
of attraction
Delocalised
electrons that move freely
Bonds act in all directions
Giant
structure with high melting and boiling points
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