AQA GCSE Combined Science Trilogy · 8464
Specification 5.2.1.2 · Paper 3
- Revise: Ionic Bonding Mechanisms
A representation of electrons using different symbols to show which atoms the electrons originally came from.
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GCSE Combined Science · key term
A representation of electrons using dots and crosses to distinguish electrons originally belonging to different atoms.
Used by AQA and Edexcel
Specification 5.2.1.2 · Paper 3
A representation of electrons using different symbols to show which atoms the electrons originally came from.
Specification Ionic bonding, Covalent bonding · Paper 3, Paper 4
Revise: Ionic bondingA dot and cross diagram lets you track the electrons from different atoms. Use crosses for the metal atom’s outer electrons and dots for the non-metal atom’s outer electrons.
A representation of outer-shell electrons that uses dots and crosses to distinguish electrons supplied by different atoms.
In an ionic dot and cross diagram, show each final ion in square brackets with its charge outside. Dots and crosses distinguish where the electrons came from; they are not different types of electron.
In a dot-and-cross diagram, include the unshared outer-shell electrons as well as the shared pairs.
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