In general non-scientific terms, isotopes are slightly different types (or versions) of atoms of the same element. If asked "What is an isotope ?" in GCSE Chemistry, a more detailed answer is required using one of the definitions below: ...
These different types of mixtures are interesting but might not be essential knowledge for GCSE Chemistry. The descriptions are non-technical (omitting details, e.g. of particle sizes), but sufficient for general comparison.The substances of which a mixture is formed can sometimes be identified ...
Flame photometry is useful forthe determination of alkali and alkaline earth metals. Used in determination of lead in petrol. Used in the study of equilibrium constants involving in ion exchange resins. Used in determination of calcium and magnesium in cement. GCSE Chemistry - Flame Emission Spectro...