CIE A Level Chemistry

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A LevelChemistryCIERevision Notes6. Inorganic Chemistry (A Level Only)6.2 Properties of Transition Elements (A Level Only)6.2.5 Defining Complexes

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First teaching 2020

Last exams 2024

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6.2.5 Defining Complexes

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Define Complex

  • A complex is a molecule or ion formed by a central metal atom or ion surrounded by one or more ligands
  • A ligand is a species that contains one or more lone pairs of electrons
  • The ligand forms a dative covalent bond with the central metal atom or ion, by donating its lone pair of electrons

Chemistry of Transition Elements - Example of a Complex, downloadable AS & A Level Chemistry revision notes

Example of a complex ion formed by a central aluminium(III) ion and six water molecule ligands

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    Fran studied for a BSc in Chemistry with Forensic Science, and since graduating taught A level Chemistry in the UK for over 11 years. She studied for an MBA in Senior Leadership, and has held a number of roles during her time in Education, including Head of Chemistry, Head of Science and most recently as an Assistant Headteacher. In this role, she used her passion for education to drive improvement and success for staff and students across a number of subjects in addition to Science, supporting them to achieve their full potential. Fran has co-written Science textbooks, delivered CPD for teachers, and worked as an examiner for a number of UK exam boards.