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A network solid or covalent network solid is a chemical compound (or element) in which the atoms are bonded by covalent bonds in a continuous network extending throughout the material.
In an ionic bond, when the metal atom has a single electron in its outer shell and the non-metal needs an electron to complete its outer shell, the metal atom gives its electron to the non-metal. Similarly, in the covalent bond, they share the electron equally. Ionic Bond. Covalent Bond. Definition. A chemical bond between two dissimilar atoms in which atom gives up an electron to another. A covalent bond is a chemical bond that involves the sharing of electrons between two similar atoms.