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Like the periodic table, the list below organizes the elements by the number of protons in their atoms; it can also be organized by other properties, such as atomic weight, density, and electronegativity. For more detailed information about the origins of element names, see List of chemical element name etymologies.
A period 2 element is one of the chemical elements in the second row (or period) of the periodic table of the chemical elements.The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behavior of the elements as their atomic number increases; a new row is started when chemical behavior begins to repeat, creating columns of elements with similar properties.
This is an accepted version of this page This is the latest accepted revision, reviewed on 2 March 2025. Periodic table of the elements with eight or more periods Extended periodic table Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese ...
Radioactive isotope table "lists ALL radioactive nuclei with a half-life greater than 1000 years", incorporated in the list above. The NUBASE2020 evaluation of nuclear physics properties F.G. Kondev et al. 2021 Chinese Phys. C 45 030001. The PDF of this article lists the half-lives of all known radioactives nuclides.
It is in group 18 of the periodic table and is a noble gas. [10] Argon is the third most abundant gas in Earth's atmosphere , at 0.934% (9340 ppmv ). It is more than twice as abundant as water vapor (which averages about 4000 ppmv, but varies greatly), 23 times as abundant as carbon dioxide (400 ppmv), and more than 500 times as abundant as ...
MediaWiki 1.5 includes routines to dump a wiki to HTML, rendering the HTML with the same parser used on a live wiki. As the following page states, putting one of these dumps on the web unmodified will constitute a trademark violation. They are intended for private viewing in an intranet or desktop installation.
Because the anime is made by Sunrise (the makers of the Gundam anime), and because Bandai is the show's primary sponsor, the show is able to refer to Gundam models directly without legal issues. In the manga/anime series Genshiken , Soichiro Tanaka teaches Kanako Ohno and Kanji Sasahara how to build Gundam models in Chapter 13 (adapted as ...
Stitch, also known as Experiment 626 (pronounced "six two six"), is a fictional character from Disney's Lilo & Stitch franchise.A genetically engineered, extraterrestrial life-form resembling a blue koala, he is the more prominent of the franchise's two title protagonists, the other being his human adopter and best friend Lilo Pelekai.