CAIE IGCSE Chemistry Single Covalent Bonds in Molecules

Practise drawing dot-and-cross diagrams for simple molecules, showing each shared pair, complete outer shell and lone pair without adding extra electrons.

Exam points

represent each single covalent bond as one shared pair containing one electron from each atom
complete hydrogen duets and other atoms' outer shells while retaining all required lone pairs
check a molecular diagram against the formula so every atom has the correct number of bonds

[Maximum number: 2]

Fluorine is a Group VII element. Fluorine forms compounds with metals and non-metals.

Fluorine exists as diatomic molecules.

Complete the dot-and-cross diagram to show the electron arrangement in a molecule of fluorine. Show outer shell electrons only.

Figure for Question 2.5.2—Formation of covalent bonds in simple question 1 — CAIE IGCSE Chemistry

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2.5.2—Formation of covalent bonds in simple question 1