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Edexcel A-Level Chemistry AS 3.11 Draw Dot and Cross Diagrams to Show Electrons in Covalent Substances Questions

Practise defining covalent bonds, drawing dot-and-cross diagrams and linking molecular or giant structures to melting evidence using Edexcel IAL Chemistry questions.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
AS

Exam points

  • Define a covalent bond as attraction between two nuclei and a shared electron pair.
  • Draw dot-and-cross diagrams showing bonding pairs and lone pairs accurately.
  • Explain melting evidence through covalent bond strength and molecular or giant structure.

Edexcel A-Level Chemistry AS 3.11 Draw Dot and Cross Diagrams to Show Electrons in Covalent Substances Questions question 1

[Maximum number: 2]

Chlorine dioxide, ClO2\mathrm{ClO}_{2}, can be used to treat water to make it safe for drinking. The molecule is a free radical. One suggested structure is shown.

Figure for Question Edexcel A-Level Chemistry AS 3.11 Draw Dot and Cross Diagrams to Show Electrons in Covalent Substances Questions question 1 — Edexcel A-Level Chemistry AS

Complete the dot-and-cross diagram for this structure. Use dots (•) for oxygen electrons and crosses (×) for chlorine electrons.

Figure for Question Edexcel A-Level Chemistry AS 3.11 Draw Dot and Cross Diagrams to Show Electrons in Covalent Substances Questions question 1 — Edexcel A-Level Chemistry AS
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