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A Nicholson model, showing a short part of protein backbone (white) with side chains (grey). Note the snipped stubs representing hydrogen atoms. A good example of composite models is the Nicholson approach, widely used from the late 1970s for building models of biological macromolecules.
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Print/export Download as PDF; Printable version; In other projects Wikidata item; Appearance. ... Template documentation. This periodic table is the prime form ...
Print/export Download as PDF; Printable version; ... List of chemical elements. Element Origin of name [1] [2] Group Period Block Standard atomic weight A r °(E) [a]
This lists the character tables for the more common molecular point groups used in the study of molecular symmetry.These tables are based on the group-theoretical treatment of the symmetry operations present in common molecules, and are useful in molecular spectroscopy and quantum chemistry.
General inorganic chemistry texts often put scandium (Sc), yttrium (Y), lanthanum (La), and actinium (Ac) in group 3, so that Ce–Lu and Th–Lr become the f-block between groups 3 and 4; this was based on incorrectly measured electron configurations from history, [3] and Lev Landau and Evgeny Lifshitz already considered it incorrect in 1948. [4]
This is an index of lists of molecules (i.e. by year, number of atoms, etc.). Millions of molecules have existed in the universe since before the formation of Earth. Three of them, carbon dioxide, water and oxygen were necessary for the growth of life.
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