Skip to content
    Chemistry A-Level

    Complex ion

    What Complex ion means in Chemistry A-Level, as defined for OCR.

    Definition of Complex ion

    Check what you remember

    Read the wording for your board, then hide it and explain Complex ion in your own words. Rough notes are fine. This is a self-check, with no mark or grade.

    Reference: OCR

    A central transition-metal ion surrounded by ligands bonded by coordinate (dative covalent) bonds, with each ligand donating a lone pair into a vacant orbital on the metal.
    OCR · Transition elements

    Topics that use Complex ion

    Related terms

    Using Complex ion in the exam

    Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.

    Practise Chemistry questions

    Create a free account to answer exam-style questions on this topic and get feedback on your answers.

    Start free

    A week of Premium from your first lesson · Then the free plan continues · No card, no charge

    All Chemistry A-Level terms