Chemistry A-Level
brackets in formulae
What brackets in formulae means in Chemistry A-Level, as defined for AQA.
Definition of brackets in formulae
Check what you remember
Read the wording for your board, then hide it and explain brackets in formulae in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Used when more than one compound ion is needed, with the whole ion bracketed before the subscript.
Topics that use brackets in formulae
- Ionic bonding (AQA A-Level)
Related terms
- charge and radius
- conductivity when molten
- electrostatic attraction
- giant ionic lattice
- simplest ratio
- balancing charge
- charges to learn
- compound ions
Using brackets in formulae 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
All Chemistry A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge