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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). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
Printable version; In other projects Wikidata item; ... Atomic number Z Symbol ... List of chemical elements/2020}} ...
This is a list of chemical elements and their atomic properties, ordered by atomic number (Z).. Since valence electrons are not clearly defined for the d-block and f-block elements, there not being a clear point at which further ionisation becomes unprofitable, a purely formal definition as number of electrons in the outermost shell has been used.
Printable version; In other projects ... Used in article List of chemical elements § List. Properties and parameters. Element; atomic number (Z) Symbol |symbol= name ...
Printable version; In other projects Wikidata item; Appearance. ... Pages in category "Lists of chemical elements" The following 12 pages are in this category, out of ...
Each chemical element has a unique atomic number (Z— for "Zahl", German for "number") representing the number of protons in its nucleus. [4] Each distinct atomic number therefore corresponds to a class of atom: these classes are called the chemical elements. [5] The chemical elements are what the periodic table classifies and organizes.