Exam code: 5070
Which statement correctly describes the bonding in metals?
A lattice of negative ions in a “sea of electrons”.
A lattice of positive ions in a “sea of electrons”.
A lattice of neutral atoms with delocalised electrons.
A lattice of positive ions in which each electron stays with its own ion.
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Which row provides a correct description of metals?
conducts electricity | malleable | contains delocalised electrons | |
A | |||
B | |||
C | |||
D |
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An iron nail is connected into a simple circuit with a battery and a lamp. When the circuit is complete, the lamp lights up.
Which statement explains why the iron nail conducts electricity?
It is the positive ions that move through the metal structure, carrying the electric charge as they go.
The delocalised electrons are held in place between the ions and are unable to move through the structure.
Electrons transfer from the iron nail to a non-metal, creating a flow of charge.
The delocalised electrons can flow through the whole metal structure, allowing them to carry the charge.
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Which diagram shows the arrangement of particles in a metal?
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Nickel is described as a malleable metal.
What does malleable mean?
It can be drawn out into a thin wire.
It allows electricity to pass through it.
It can be hammered into a different shape without breaking.
It returns to its original shape after being bent.
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A copper wire conducts electricity when it is connected in a circuit.
Which statement explains how the copper conducts electricity?
The delocalised electrons move through the wire and carry the charge.
The copper ions move through the wire and carry the charge.
The delocalised electrons are held in fixed positions between the copper ions and pass the charge along the wire.
The copper ions vibrate and pass the charge from one ion to the next.
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A small piece of gold is hammered into a thin sheet. It changes shape without breaking.
Which statement explains why the gold can be hammered into a thin sheet?
The delocalised electrons slide over one another.
The positive ions and the delocalised electrons are all held in fixed positions.
Layers of positive ions slide over one another and the metallic bonding is maintained.
Individual positive ions slide over one another and take up new positions.
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Metals are malleable and ductile and can be hammered and pulled into useful shapes.
Which statement correctly explains these properties?
Layers of atoms in the metal lattice are rigid and held strongly together so they cannot move.
Layers of atoms in a metal can slide over one another and break the attractive forces that hold them together.
Layers of atoms in a metal can slide over one another and the attractive forces between the metal ions and the delocalised electrons are not broken.
Layers of atoms in a metal cannot slide over one another and the attractive forces between the metal ions and the delocalised electrons are unbreakable.
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Three statements about the structure of a metal are shown.
1 The lattice contains positively charged metal ions.
2 Each delocalised electron is attracted to one particular metal ion.
3 The delocalised electrons are attracted to all the positive ions in the lattice.
Which statements are correct?
1 and 2 only
2 and 3 only
1 and 3 only
1, 2 and 3
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Platinum can be drawn out into a very thin wire without breaking.
Which statement explains why platinum is ductile?
Layers of ions can take up new positions while the delocalised electrons continue to attract them.
The delocalised electrons move into new positions and pull the ions after them.
Individual ions break away from the lattice and take up new positions.
The layers can slide because there is no attraction between the ions and the delocalised electrons.
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Metallic bonds are very strong and give metals their properties. Which of the following definitions is correct for a metallic bond?
A metallic bond is formed by the electrostatic attraction that occurs due to electron transfer between metal atoms.
A metallic bond is formed by the electrostatic attraction between the positive ions and the delocalised electrons.
A metallic bond is formed by the electrostatic attraction that occurs due to the uneven sharing of electrons between metal atoms.
A metallic bond is formed by the intermolecular forces between the positive metal ions and the delocalised electrons.
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Metals are good conductors of electricity.
Three statements about metals are shown.
1 Metals contain delocalised electrons.
2 The delocalised electrons can move throughout the structure.
3 The positive metal ions are arranged in layers.
Which statements are needed to explain why metals conduct electricity?
1 only
1 and 2 only
2 and 3 only
1, 2 and 3
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In a metal lattice the delocalised electrons are attracted to certain particles.
Which particles are these?
neutral metal atoms
positively charged protons that have been released from the metal nuclei
electrons in the inner shells of the metal atoms
positive metal ions
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Tin is a metal. Tin conducts electricity when it is solid and when it is molten.
Which statement explains this evidence?
Tin has a lattice of positive ions with delocalised electrons that are able to move in both states.
Tin consists of molecules that are held together by weak intermolecular forces.
Tin is an ionic compound whose ions are able to move only when it is molten.
Tin contains delocalised ions that move through the structure and carry the charge.
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