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CAIE IGCSE Chemistry Drawing and Reading Displayed Formulae

Practise drawing every atom and bond in an organic displayed formula and using a supplied structure to deduce molecular formula or bonding details.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • draw all atoms and every bond while maintaining the normal valency of carbon, hydrogen and heteroatoms
  • count each atom in a displayed structure to deduce the molecular formula accurately
  • use formula and functional-group evidence to complete a valid displayed structural arrangement

11.1.1—And interpret the displayed formula of question 1

[Maximum number: 1]

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

Tetrafluoroethene is an unsaturated compound with the formula C2 F4\mathrm{C}_{2} \mathrm{~F}_{4}. Tetrafluoroethene is the monomer used to make the polymer poly(tetrafluoroethene).

Draw the structure of a molecule of tetrafluoroethene. Show all of the atoms and all of the bonds.

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