Miscellaneous Symbols is a Unicode block (U+2600âU+26FF) containing glyphs representing concepts from a variety of categories, astrological, astronomical, chess, dice, musical notation, political symbols, recycling, religious symbols, trigrams, warning signs, and weather, among others.iscellaneous Symbols is a Unicode block (U+2600âU+26FF) containing glyphs representing concepts from a variety of categories, astrological, astronomical, chess, dice, musical notation, political symbols, recycling, religious symbols, trigrams, warning signs, and weather, among others.
reactant. 1  a person or thing that reacts. 2  Also called interactant. Chemistry. any substance that undergoes a chemical change in a given reaction.
Examples of Reactants. A general reaction may be given by the equation: A + B â C. In this example, A and B are the reactants and C is the product. There do not have to be multiple reactants in a reaction, however. In a decomposition reaction, such as: C â A + B. C is the reactant, while A and B are the products. You can tell the reactants because they are at the tail of the arrow, which points toward the products. H2 (hydrogen gas) and O2 (oxygen gas) are reactants in the reaction that forms liquid water: 2 H2(g) + O2(g) â 2 H2O(l).