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.
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 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.
Periodic table - Simple English Wikipedia, the free encyclopedia
WEBThe periodic table is a table that puts all known chemical elements in a specific order. Elements that have similar characteristics are often put near each other. In the table, the elements are placed in the order of their atomic numbers starting …
Chemical symbol - Wikipedia
WEBChemical symbol. The periodic table, elements being denoted by their symbols. Chemical symbols are the abbreviations used in chemistry, mainly for chemical elements; but also for functional groups, chemical compounds, and other entities. Element symbols for chemical elements normally consist of one or two letters from the Latin alphabet and are ...
Chemical element - Simple English Wikipedia, the free …
WEBA chemical element is a substance that is made up of only one type of atom. [2] 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.
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