i can not understand the question. There seems to be missing info
Reactants and products contain the same atoms, but they are rearranged during the reaction, so they are different substances
Answer:
SEM provides detailed high resolution images of the sample by rastering a focussed electron beam across the surface and detecting secondary or backscattered electron signal. An Energy Dispersive X-Ray Analyzer (EDX or EDA) is also used to provide elemental identification and quantitative compositional information.