Chemical | search
Click here to view Chemical news from 60+ newspapers.
Bookmark or Share- Periodic table | Definition, Elements, Groups, Charges, Trends, & Facts ...The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson.
- Chemistry | Definition, Topics, Types, History, & Facts | BritannicaMost 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 element | Definition, Origins, Distribution, & Facts | BritannicaA 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 composed. Learn more about the origins, distribution, and characteristics of chemical elements in this article.
- Chemical reaction | Definition, Equations, Examples, & Types - BritannicaA chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products. The properties of ...
- chemical energy - Kids | Britannica Kids | Homework HelpChemical energy is a form of potential energy that is in all substances. Food is the most important source of chemical energy for living things. The chemical energy in food is converted, or changed, by the body into moving mechanical energy and heat energy.
More
