CAIE A-Level Chemistry AS 3.7.1 Dot and Cross Diagrams to Illustrate Ionic Questions

Practise drawing dot-and-cross diagrams that show outer-shell electron arrangements in ionic and covalent compounds using CAIE 9701 AS questions and mark schemes.

Exam points

Draw dot-and-cross diagrams showing the arrangement of outer-shell electrons in ionic and covalent compounds.

[Maximum number: 1]

In which species does the underlined atom have an incomplete outer shell?

$\mathrm{BF}_{3}$

$\mathrm{CH}_{3}{ }^{-}$

$\mathrm{F}_{2} \underline{\mathrm{O}}$

$\mathrm{H}_{3} \underline{\mathrm{O}}^{+}$

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CAIE A-Level Chemistry AS 3.7.1 Dot and Cross Diagrams to Illustrate Ionic Questions question 1