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

    Feb 3, 2026 · Cooking, fermentation, glass making, and metallurgy are all chemical processes that date from the beginnings of civilization. Today, vinyl, Teflon, liquid crystals, semiconductors, and …

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

    5 days ago · 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 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.

  4. Chemical element | Definition, Origins, Distribution, & Facts | Britannica

    Jan 9, 2026 · 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 …

  5. Chemical Definition & Meaning | Britannica Dictionary

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

  6. Periodic table | Definition, Elements, Names, Symbols, Groups, Charges ...

    2 days ago · Periodic table, in chemistry, is an organized array of all the chemical elements in order of increasing atomic number. When the elements are thus arranged, there is a recurring pattern in …

  7. Evaporation | Definition, Water Cycle, & Facts | Britannica

    Feb 7, 2026 · Evaporation, process by which an element or compound transitions from its liquid state to its gaseous state below its boiling temperature. It is also how liquid water enters the atmosphere as …

  8. Chemical Products Portal | Britannica

    Chemical Products 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.

  9. Protein | Definition, Structure, & Classification | Britannica

    Feb 3, 2026 · Protein enzymes catalyze the vast majority of chemical reactions that occur in the cell. Proteins provide many of the structural elements of a cell, and they help to bind cells together into …

  10. Boron | Properties, Uses, & Facts | Britannica

    Jan 9, 2026 · Boron, chemical element that is a semimetal essential to plant growth and of wide industrial application. Typical effects of long-term boron deficiency are stunted, misshapen growth; …