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STR # notes DNA sequence repeat motif alleles mutation rate links DXS10011 DXS10066 DXS10066 is also known as Penta X-16.: DXS10067 DXS10067 is also known as Penta X-12. ...
In 1982, the firm launched its famous Pigma marker pen lines. [2] [3] In 1984, Sakura invented the first gel-based ink, featured in its new ballpoint pens lines. Gel ink pens are currently produced by many stationery companies. In 1991 Sakura acquired the Dutch company Royal Talens, and in 1997 the Dutch pencil maker Bruynzeel . [1]
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 ...
List of chemical elements — with basic properties like standard atomic weight, m.p., b.p., abundance; Abundance of the chemical elements; Abundances of the elements (data page) — Earth's crust, sea water, Sun and Solar System; Abundance of elements in Earth's crust
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.
List of chemical elements. Element Origin of name [1] [2] Group Period Block Standard atomic weight A r °(E) [a] Density [b] [c] Melting point [d] Boiling point [e ...
List of elements by atomic properties; List of elements by stability of isotopes; A. Abundance of elements in Earth's crust; D. Discovery of chemical elements; M.
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.