plural chemicals Britannica Dictionary definition of CHEMICAL [count] : a substance (such as an element or compound) that is made by a chemical process

Apr 17, 2026 · 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 …

Chemical industry, complex of processes, operations, and organizations engaged in the manufacture of chemicals and their derivatives. Raw materials include fossil fuels and inorganic chemicals. An …

Apr 2, 2026 · Cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and …

Apr 8, 2026 · 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. …

This is an interactive periodic table of the elements showing their atomic weights, atomic numbers, electron configurations, and state at room temperature.

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 …

Mar 21, 2026 · Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is …

Mar 24, 2026 · Helium is a chemical element, an inert gas of Group 18 (noble gases) of the periodic table. The second lightest element, helium is a colorless, odorless, and tasteless gas that becomes …

Apr 17, 2026 · 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 …