Practice question · Match the pairs
Match each bonding model to the property it explains most directly.
- Delocalised electron sea
- Electrostatic lattice of ions
- Shared electron pair
- Unequal sharing of a pair
- A permanent bond dipole
- Discrete molecules with definite shapes
- Electrical conductivity in metals
- High melting point and brittleness of salts
Hints
- Match the picture of the electrons to the observable it accounts for.
- A dipole comes from sharing that is unequal rather than absent.
Show the answer
- Delocalised electron sea → Electrical conductivity in metals
- Electrostatic lattice of ions → High melting point and brittleness of salts
- Shared electron pair → Discrete molecules with definite shapes
- Unequal sharing of a pair → A permanent bond dipole
Why
Each model earns its keep by an observation: mobile electrons give conduction, a rigid charged lattice gives high melting points and brittleness, a localised shared pair gives molecular shape, and unequal sharing gives a dipole.
Practise Chemical Bonds and Electronegativity
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