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CAIE A-Level Chemistry 3.7.1 Ionic, Covalent and Dative Diagrams

Practise drawing complete outer-shell diagrams for ordinary, expanded-octet and odd-electron species.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • derive total valence electrons and connectivity before placing bonding and non-bonding electrons
  • show electron transfer and bracketed charges for ions, but shared pairs for covalent bonds
  • show both electrons from the donor in a coordinate bond and retain odd electrons or expanded octets when required

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