dot-and-cross diagrams
What dot-and-cross diagrams means in Chemistry A-Level, as defined for AQA, OCR.
Definitions of dot-and-cross diagrams
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Reference: AQA
A diagram in which the shared pair sits in the overlap of the two circles, with one dot and one cross, and electrons not involved are drawn as lone pairs.
Diagrams in which the outer-shell electrons of one atom are drawn as dots and those of the other as crosses, showing the transfer of electrons.
Topics that use dot-and-cross diagrams
- Nature of covalent and dative covalent bonds (AQA A-Level)
- Bonding and structure (OCR A-Level)
Related terms
- bond length and strength
- dative covalent bonding
- Anomalous melting and boiling points
- arrow direction
- arrows for dative bonds
- Average bond enthalpy
- Averaging over similar compounds and its limitation
- Bond angles
Using dot-and-cross diagrams in the exam
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