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.
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).
Periodic table - Wikipedia
WebThe periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows ("periods") and columns ("groups"). It is an icon of chemistry and is widely used in physics and other sciences.
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 ...
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 …
Naming of chemical elements - Wikipedia
WebKnown elements. All 118 discovered elements are confirmed and have a formal name and symbol, as decided by IUPAC. The last four names and symbols were added on November 28, 2016. [1] [2] Currently there are no unconfirmed discoveries and all seven periods (rows) of the periodic table are completed. v.
List of elements - Simple English Wikipedia, the free encyclopedia
WebThis page shows a list of all 118 chemical elements that have been identified. Legend. Categories and subcategories in the metal–nonmetal range. List. Notes. ^1 The element does not have any stable nuclides, and a value in brackets, e.g. [209], indicates the mass number of the longest-lived isotope of the element.
Discovery of chemical elements - Wikipedia
WebThe discoveries of the 118 chemical elements known to exist as of 2024 are presented here in chronological order. The elements are listed generally in the order in which each was first defined as the pure element, as the exact date of discovery of most elements cannot be accurately determined.
Abundance of the chemical elements - Wikipedia
WebHeavier elements, beginning with carbon, have been produced in dying or supernova stars by buildup from alpha particles (helium nuclei), contributing to an alternatingly larger abundance of elements with even atomic numbers (these are also more stable). The effect of odd-numbered chemical elements generally being more rare in the universe was …
List of chemical element name etymologies - Wikipedia
WebForty-one of the 118 chemical elements have names associated with, or specifically named for, places around the world or among astronomical objects.
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