01Structure 1 · Models of the particulate nature of matter10 questionsS1.2 The nuclear atom10 questionsStartChoose a focusIsotopes1 questionSubatomic particles1 questionAtomic evidence1 questionRelative atomic mass1 questionMass-spectral data1 questionIsotopes and chemistry1 questionMass measurements1 questionIsotopic composition1 questionInverse isotope calculations1 questionEvaluating spectra1 question
