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The 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. It is a depiction of the periodic law, which states that when the elements are arranged in order ...
Mendelevium 101 Md [258] Nobelium 102 No [259] Primordial From decay Synthetic Border shows natural occurrence of the element. Standard atomic weight Ar, std(E)[ 1] Ca: 40.078 — Abridged value (uncertainty omitted here) [ 2] Po: [209] — mass number of the most stable isotope. s-block. f-block.
The template takes parameter number= (atomic number). When this number is >118, the template expands with periods 8 and above, adding the (predicted) elements with atomic number >119. Apart from this 118/119 switching, the parameter is not used as an atomic number. {{Periodic table (32 columns, micro)|number= 119 }} Hydrogen.
This is an accepted version of this page This is the latest accepted revision, reviewed on 9 October 2024. Development of the table of chemical elements The American chemist Glenn T. Seaborg —after whom the element seaborgium is named—standing in front of a periodic table, May 19, 1950 Part of a series on the Periodic table Periodic table forms 18-column 32-column Alternative and extended ...
FA: current Featured Picture used in the infobox. A: current infobox picture is of high quality (could become FP) B: current infobox picture is of good quality. C: current infobox image is of poor technical or encyclopedic quality. Start: only copyrighted pictures available.
List of chemical elements - Wikipedia. List of chemical elements. 118 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). [ 1 ]
Template. : Periodic table (micro) Template documentation [ view] [ edit] [ history] [ purge] The template shows a periodic table with small cells. Each cell is wikilinked to the element's article, and the background color is the category as used (commonly) on this wiki.
Periodic table (group names) a Group 1 is composed of hydrogen (H) and the alkali metals. Elements of the group have one s-electron in the outer electron shell. Hydrogen is not considered to be an alkali metal as it is not a metal, though it is more analogous to them than any other group. This makes the group somewhat exceptional.
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