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ISO 10628 Diagrams for the chemical and petrochemical industry specifies the classification, content, and representation of flow diagrams. It does not apply to electrical engineering diagrams.
Fig. 1. Electron sharing in multivalent atomic binding. The dots and crosses represent the outer electrons of the two different species in each molecule.
Alchemical symbols were used to denote chemical elements and compounds, ... Official Unicode Consortium code chart (PDF) ... large file) An 1888 reproduction ...
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Some recent embedded systems also use proprietary character sets, usually extensions to ISO 8859 character sets, which include box-drawing characters or other special symbols. Other types of box-drawing characters are block elements , shade characters, and terminal graphic characters; these can be used for filling regions of the screen and ...
The Miscellaneous Mathematical Symbols-B block (U+2980–U+29FF) contains miscellaneous mathematical symbols, including brackets, angles, and circle symbols. Miscellaneous Mathematical Symbols-B [1] Official Unicode Consortium code chart (PDF)
Polyvalence or polyvalent may refer to: Polyvalency (chemistry), chemical species, generally atoms or molecules, which exhibit more than one chemical valence; Polyvalence (music), the musical use of more than one harmonic function of a tonality simultaneously; Polyvalent antibody, a group of antibodies that have affinity for various antigens
Unicode chart Supplemental Symbols and Pictographs}} provides a table listing the characters in the Supplemental Symbols and Pictographs block of Unicode. The display can be changed to show only rows containing emoticons using an optional parameter.