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| a neutral crystalline substance, C2H7NO3S, obtained from bile |
| a purplish-red, water-soluble powder, C20H11N2O10Na3, an azo dye used chiefly to color pharmaceuticals, food, and garments |
| covalent bond | |
| —n | |
| a type of chemical bond involving the sharing of electrons between atoms in a molecule, esp the sharing of a pair of electrons by two adjacent atoms | |
covalent bond n.
A chemical bond formed by the sharing of one or more electrons, especially pairs of electrons, between atoms.
covalent bond (kō-vā'lənt) Pronunciation Key
(click for larger image in new window) A chemical bond formed when electrons are shared between two atoms. Usually each atom contributes one electron to form a pair of electrons that are shared by both atoms. See more at coordinate bond, double bond, polar bond. |
A chemical bond in which two atoms share some of their valence electrons, thereby creating a force that holds the atoms together.
Note: Many molecules in living systems are held together by covalent bonds.