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The Arrows block contains eight emoji: U+2194–U+2199 and U+21A9–U+21AA. [3] [4]The block has sixteen standardized variants defined to specify emoji-style (U+FE0F VS16) or text presentation (U+FE0E VS15) for the eight emoji, all of which default to a text presentation.
Alchemical Symbols is a Unicode block containing symbols for chemicals and substances used in ancient and medieval alchemy texts. Many of the symbols are duplicates or redundant with previous characters.
Alchemical symbols were used to denote chemical elements and compounds, as well as alchemical apparatus and processes, until the 18th century. Although notation was partly standardized, style and symbol varied between alchemists.
English: Arrow pushing - movement of an electron pair. Date: 26 December 2010: ... This chemical equation uses embedded text for its chemistry symbols. Licensing.
The Miscellaneous Symbols and Arrows block contains seven emoji: U+2B05–U+2B07, U+2B1B–U+2B1C, U+2B50 and U+2B55. [3] [4]The block has fourteen standardized variants defined to specify emoji-style (U+FE0F VS16) or text presentation (U+FE0E VS15) for the seven emoji.
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The Supplemental Arrows-B block contains two emoji: U+2934–U+2935. [ 3 ] [ 4 ] The block has four standardized variants defined to specify emoji-style (U+FE0F VS16) or text presentation (U+FE0E VS15) for the two emoji, both of which default to a text presentation.
File:Biochem reaction arrow Y XXXX Z med.svg. Y is a word indicating the chemical direction of the arrow, either "forward", "reverse", or "reversible". XXXX is a list of four characters indicating whether each side has an arrow or not. Each X is replaced with "Y" or "N" to indicate the presence or absence of a side arrow.