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  1. Chemical Definition & Meaning | Britannica Dictionary

    CHEMICAL meaning: 1 : of or relating to chemistry; 2 : working by means of chemicals

  2. Chemical compound | Definition, Examples, & Types | Britannica

    Dec 16, 2025 · All the matter in the universe is composed of the atoms of more than 100 different chemical elements, which are found both in pure form and combined in chemical compounds.

  3. Chemical reaction | Definition, Equations, Examples, & Types

    Nov 30, 2025 · Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

  4. Chemistry | Definition, Topics, Types, History, & Facts | Britannica

    Dec 26, 2025 · Cooking, fermentation, glass making, and metallurgy are all chemical processes that date from the beginnings of civilization. Today, vinyl, Teflon, liquid crystals, …

  5. Chemical engineering | Processes, Principles & Applications

    Dec 6, 2025 · The fundamental principles of chemical engineering underlie the operation of processes extending well beyond the boundaries of the chemical industry, and chemical …

  6. Chemical element - Atomic Structure, Periodic Table, Properties ...

    5 days ago · The main problem concerned with the origin of the chemical elements is to decide to what extent the chemical composition of the stars seen today differs from the initial chemical …

  7. Chemical equation | Balancing, Reactants, Products | Britannica

    Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products. Chemical …

  8. Chemical castration | Usage, Treatment, Legality, & Facts | Britannica

    Chemical castration differs from surgical castration in that it is reversible and its effects typically stop when the drugs are ceased. Chemical castration is used in the treatment of certain types …

  9. The Chemical Brothers | Members, Career, Music, & Facts | Britannica

    Jan 11, 1971 · The Chemical Brothers, a British deejay-producer duo who pioneered the big beat dance music genre in the 1990s with such singles as ‘Chemical Beats,’ ‘Block Rockin’ Beats,’ …

  10. Chemical compound - Synthesis, Reactions, Properties | Britannica

    Dec 16, 2025 · Chemical compound - Synthesis, Reactions, Properties: Chemical synthesis is concerned with the construction of complex chemical compounds from simpler ones. A …