Edexcel A-Level Chemistry AS 3.14 Ionic and Covalent Bonding Are the Extremes of a Continuum of Bonding Type Questions

Practise defining electronegativity as attraction for a shared electron pair, comparing values to explain bond polarity and ionic or covalent character in Edexcel IAL Chemistry evidence.

Exam points

State electronegativity as an atom's ability to attract a shared pair of electrons.

[Maximum number: 2]

The elements carbon and silicon both form dioxides.

The shape of the carbon dioxide molecule affects its physical properties.

Explain the polarity of the carbon-oxygen bond.

An explanation that makes reference to the following points:

- the carbon atom is slightly positive $/ \delta+$ and the oxygen atom slightly negative / δ-

- because oxygen is more electronegative than carbon

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Edexcel A-Level Chemistry AS 3.14 Ionic and Covalent Bonding Are the Extremes of a Continuum of Bonding Type Questions question 1