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  • Chemistry | Definition, Topics, Types, History, Facts | Britannica
    Chemistry is the science of the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes Chemistry is concerned with the properties of atoms and the laws governing their combinations
  • Chemistry Portal | Britannica
    Chemistry's vast scope comprises organic, inorganic, physical, analytical, and industrial chemistry, along with biochemistry, environmental chemistry, medicinal chemistry, and much more
  • Concept and branches of chemistry | Britannica
    chemistry, Science that deals with the properties, composition, and structure of substances (elements and compounds), the reactions and transformations they undergo, and the energy released or absorbed during those processes
  • Chemistry - Applications, Benefits, Impacts | Britannica
    Chemistry - Applications, Benefits, Impacts: For the first two-thirds of the 20th century, chemistry was seen by many as the science of the future The potential of chemical products for enriching society appeared to be unlimited Increasingly, however, and especially in the public mind, the negative aspects of chemistry have come to the fore Disposal of chemical by-products at waste-disposal
  • Chemistry - Analysis, Reactions, Compounds | Britannica
    Chemistry - Analysis, Reactions, Compounds: Most of the materials that occur on Earth, such as wood, coal, minerals, or air, are mixtures of many different and distinct chemical substances Each pure chemical substance (e g , oxygen, iron, or water) has a characteristic set of properties that gives it its chemical identity Iron, for example, is a common silver-white metal that melts at 1,535
  • Chemistry - Methodology, Elements, Reactions | Britannica
    Chemistry - Methodology, Elements, Reactions: Chemistry is to a large extent a cumulative science Over time the number and extent of observations and phenomena studied increase Not all hypotheses and discoveries endure unchallenged, however Some of them are discarded as new observations or more satisfying explanations appear Nonetheless, chemistry has a broad spectrum of explanatory models
  • Periodic table | Definition, Elements, Names, Symbols, Groups, Charges . . .
    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 which elements in the same column (group) have similar properties
  • Chemistry - Biomolecules, Macromolecules, Reactions | Britannica
    Chemistry - Biomolecules, Macromolecules, Reactions: As understanding of inanimate chemistry grew during the 19th century, attempts to interpret the physiological processes of living organisms in terms of molecular structure and reactivity gave rise to the discipline of biochemistry Biochemists employ the techniques and theories of chemistry to probe the molecular basis of life An organism
  • Chemistry - Isomerism, Structural, Stereoisomers | Britannica
    Chemistry - Isomerism, Structural, Stereoisomers: Many elements can form two or more covalent bonds, but only a few are able to form extended chains of covalent bonds The outstanding example is carbon, which can form as many as four covalent bonds and can bond to itself indefinitely Carbon has six electrons in total, two of which are paired in an atomic orbital closest to the nucleus The
  • Organic chemistry | Description, Areas of Specialization, Natural . . .
    Organic chemistry, field of science concerned with the composition, properties, and structure of chemical elements and compounds that contain carbon atoms Carbon is unique in the variety and extent of structures that can result from the three-dimensional connections of its atoms Organic chemistry





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