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atom, background, biotechnology, carbon, chemical, chemist, chemistry, color, colorful, danger, dioxide, discovery, element, eruption, experiment, flask, fluid, formula, glass, glassware, isolated, lab, laboratory, liquid, medical, medicine, molecular, object, one, pharmacy, process, reaction, reagent, research, school, science, scientific, single, steam, study, substance, technology, temperature, test, transparent, white,