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  1. Chemical reaction | Definition, Equations, Examples, & Types - Britannica

    Oct 10, 2025 · A chemical reaction is a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical …

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

    Nov 11, 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 element | Definition, Origins, Distribution, & Facts - Britannica

    Oct 17, 2025 · 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 …

  4. Chemical Definition & Meaning | Britannica Dictionary

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

  5. Chemical Banking Corporation | Merger, Acquisition, Rebranding ...

    Nov 14, 2025 · The merged company became the Chemical Banking Corporation. In 1996 the firm, which was by then the second-largest bank in the United States, merged with another New York …

  6. Chemical weapon - Nerve Agents, Toxins, Warfare | Britannica

    Chemical weapon - Nerve Agents, Toxins, Warfare: The most lethal and important chemical weapons contain nerve agents, which affect the transmission of impulses through the nervous system.

  7. Chemical formula | Definition, Types, Examples, & Facts | Britannica

    Nov 1, 2025 · 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 …

  8. My Chemical Romance | Members, Albums, & Facts | Britannica

    Sep 30, 2025 · My Chemical Romance, American alternative rock band credited with helping to popularize the emo style of music, a subgenre of punk rock fusing confessional lyrics and punk …

  9. Chemical Products Portal | Britannica

    Although nature provides us with a staggering amount of natural resources, humankind has also made use of a great variety of man-made compounds and substances. The chemical industry converts raw …

  10. 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,’ ‘Loops of …