Chemistry A-Level
unit conversions
What unit conversions means in Chemistry A-Level, as defined for AQA.
Definition of unit conversions
Check what you remember
Read the wording for your board, then hide it and explain unit conversions in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The wavelength must be in metres, so a wavelength quoted as 600 nm becomes 6.00 × 10⁻⁷ m before substituting into ΔE = hc/λ.
Topics that use unit conversions
- Formation of coloured ions (A-level only) (AQA A-Level)
Related terms
- absorption of visible light
- absorption spectrum
- calibration curve
- colour changes on adding reagents
- complementary colour
- filter selection
- ground state and excited state
- size of the d orbital gap
Using unit conversions 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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