11 markeasy
Which type of bonding is described as the electrostatic attraction between positive ions and delocalised electrons?
Choose your answer
dipole
hydrogen
ionic
metallic
Chemistry — A-Level
9 questions · 9 marks · ≈ 9 min
Which type of bonding is described as the electrostatic attraction between positive ions and delocalised electrons?
Choose your answer
dipole
hydrogen
ionic
metallic
Which solid contains only one type of bonding?
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ammonium chloride
brass
ice
iodine
Which statement explains why solid copper conducts electricity?
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Delocalised electrons can move through the lattice.
Positive ions can move through the lattice.
The layers of ions can slide over each other.
There is an electrostatic attraction between positive ions and delocalised electrons.
Which properties are characteristic of metals?
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brittleness and low ductility
low electrical conductivity and low thermal conductivity
low melting point and boiling point
malleability and ductility
Which factor explains the high thermal conductivity of metals?
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mobile delocalised electrons
presence of ions
strong covalent bonds
weak metallic bonds
What happens to the metallic bonds when a metal is hammered into thin sheets?
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they become stronger
they break and do not re-form
they break and re-form
they remain completely unchanged
Sodium and magnesium are both Period 3 elements.
Which row explains why the first ionisation energy of magnesium is higher than that of sodium?
| Magnesium has a smaller atomic radius | Magnesium has a larger nuclear charge | Stronger nuclear attraction for outer electrons | |
|---|---|---|---|
| A | ✓ | ✓ | ✓ |
| B | ✓ | ⨯ | ⨯ |
| C | ⨯ | ⨯ | ✓ |
| D | ✓ | ✓ | ⨯ |
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Which metal has the highest electrical conductivity?
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Al
Li
Mg
Na
Which compound has the most polarised anion?
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KF
KI
LiF
LiI