Pearson Edexcel IAL Chemistry 3.13 Electronegativity

Practise defining electronegativity precisely for atoms in covalent bonds and using the definition in bonding explanations.

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

Figure for Answer to Question 3.14—Ionic and covalent bonding are the extremes of a continuum of bonding type question 1 — Edexcel A-Level Chemistry AS

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3.14—Ionic and covalent bonding are the extremes of a continuum of bonding type question 1