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CAIE A-Level Chemistry 3.7 Dot-and-Cross Diagrams

Practise representing ionic, covalent and coordinate bonding with outer electrons, lone pairs, charges and electron origins.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • use different symbols consistently to show electrons from different atoms and show outer electrons only
  • include every bonding pair, lone pair and unpaired electron required by the species
  • enclose ions in brackets with charges and show both ionic and coordinate bonding when present

Covered syllabus points

3.7.1—Dot-and-cross diagrams to illustrate ionic,

3.7 Dot-and-cross diagrams question 1

[Maximum number: 2]

The Pauling electronegativity values of elements can be used to predict the chemical properties of compounds.

Use the information in Table 1.1 to answer the following questions.

Table 1.1

Table 1.1

LiH is an ionic compound.

Draw a dot-and-cross diagram of LiH.
Include all electrons.

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