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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.
Chemical Definition & Meaning | Britannica Dictionary
plural chemicals Britannica Dictionary definition of CHEMICAL [count] : a substance (such as an element or compound) that is made by a chemical process
Chemical reaction | Definition, Equations, Examples, & Types - Britannica
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 elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
Chemical Banking Corporation | Merger, Acquisition, Rebranding ...
Chemical Banking Corporation, former American bank holding company that merged with The Chase Manhattan Corporation in 1996. The holding company’s principal subsidiary was Chemical Bank, which was chartered in 1824 in New York City as a division of the New York Chemical Manufacturing Company.
Interactive Periodic Table of the Elements | Symbols, Atomic Weights ...
This is an interactive periodic table of the elements showing their atomic weights, atomic numbers, electron configurations, and state at room temperature.
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. It includes glycolysis, the TCA cycle, and oxidative phosphorylation.
Chemical equilibrium | Definition, Equation, & Facts | Britannica
Chemical equilibrium is the condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs. A reversible chemical reaction is one in which the products, as soon as they are formed, react to produce the original reactants.
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 ...
Chemical engineering | Processes, Principles & Applications | Britannica
chemical engineering, the development of processes and the design and operation of plants in which materials undergo changes in their physical or chemical state. Applied throughout the process industries, it is founded on the principles of chemistry, physics, and mathematics. The laws of physical chemistry and physics govern the practicability and efficiency of chemical engineering operations ...
Lipid | Definition, Structure, Examples, Functions, Types, & Facts ...
Lipid, any of a diverse group of organic compounds including fats, oils, hormones, and certain components of membranes that are grouped together because they do not interact appreciably with water.
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