Chemical substance - Wikipedia
WEBA chemical substance is a unique form of matter with constant chemical composition and characteristic properties. Chemical substances may take the form of a single element or chemical compounds. If two or more chemical substances can be combined without reacting, they may form a chemical mixture.
Chemistry - Wikipedia
WEBChemistry. Science of matter. Index. Outline. Glossary. History ( timeline) Key components. Branches. Research. Chemistry portal. Category. v. t. e. Chemistry is the scientific study of the properties and behavior of matter. [1] .
List of chemical elements - Wikipedia
WEB118 chemical elements have been identified and named officially by IUPAC. A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number , or Z ).
Chemical element - Wikipedia
WEBA chemical element is a chemical substance that cannot be broken down into other substances by chemical reactions. The basic particle that constitutes a chemical element is the atom. Chemical elements are identified by the number of protons in the nuclei of their atoms, known as the element's atomic number.
Chemical property - Wikipedia
WEBChemical property. A chemical property is any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity. [1] Simply speaking, chemical properties cannot be determined just by viewing or touching the substance; the substance ...
Chemical structure - Wikipedia
WEBChemical structure. A chemical structure of a molecule is a spatial arrangement of its atoms and their chemical bonds. Its determination includes a chemist 's specifying the molecular geometry and, when feasible and necessary, the electronic structure of the target molecule or other solid.
Chemistry - Simple English Wikipedia, the free encyclopedia
WEBChemistry is a branch of science that deals with chemical elements and compounds, and how they work together and change. In other words, chemistry is the branch of science about fundamental properties of matter and chemical reactions. Chemistry is the study of the substances and their transformations (or change).
Chemical element - Simple English Wikipedia, the free …
WEBA chemical element is a substance that is made up of only one type of atom. Atoms are made up of protons, neutrons, and electrons. The number of protons in an atom is called the atomic number. For example, all atoms with 6 protons are atoms of the chemical element carbon, and all atoms with 92 protons are atoms of the element uranium. The ...
Chemical equation - Wikipedia
WEBA chemical equation (see an example below) consists of a list of reactants (the starting substances) on the left-hand side, an arrow symbol, and a list of products (substances formed in the chemical reaction) on the right-hand side. Each substance is specified by its chemical formula, optionally preceded by a number called stoichiometric ...
Chemical substance - Simple English Wikipedia, the free …
WEBA chemical substance is any material with a known chemical composition. [1] For example, water has the same properties and the same ratio of hydrogen to oxygen whether it came from a river or was made in a laboratory. Typical chemical substances found in the home include water, salt ( sodium chloride) and bleach.
Skip to content