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Chemistry | Definition, Topics, Types, History, Facts | Britannica Cooking, fermentation, glass making, and metallurgy are all chemical processes that date from the beginnings of civilization Today, vinyl, Teflon, liquid crystals, semiconductors, and superconductors represent the fruits of chemical technology
Photosynthesis | Definition, Formula, Process, Diagram, Reactants . . . Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds
Chemical formula | Definition, Types, Examples, Facts | Britannica Chemical formula, any of several kinds of expressions of the composition or structure of chemical compounds The forms commonly encountered are empirical, molecular, structural, and projection formulas
list of chemical elements - Encyclopedia Britannica A chemical element is any substance that cannot be decomposed into simpler substances by ordinary chemical processes Elements are the fundamental materials of which all matter is composed
Cellular respiration | Definition, Equation, Cycle, Process, Reactants . . . Cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water
Chemical synthesis | Organic Inorganic Reactions | Britannica Chemical compounds are made up of atoms of different elements, joined together by chemical bonds A chemical synthesis usually involves the breaking of existing bonds and the formation of new ones