Chemistry A-Level
planar geometry
What planar geometry means in Chemistry A-Level, as defined for AQA.
Definition of planar geometry
Check what you remember
Read the wording for your board, then hide it and explain planar geometry in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The three groups around each double-bond carbon lie in a plane at about 120°.
Topics that use planar geometry
- Structure, bonding and reactivity (AQA A-Level)
Related terms
- General formula
- restricted rotation
- test with bromine water
- unsaturation
- attack by electrophiles
- carbon–carbon double bond
- high electron density
Using planar geometry 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.
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