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

Identify the shared pair and both nuclei, draw bonding and lone pairs with the required symbols and connect bond number and structure to physical-property evidence.

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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