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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.
covalent = sharing electrons. this is like being married. now you do no longer provide/take presents because you proportion each and every thing. what you're questioning of are 2 forms of covalent bonds. non-polar covalent is equivalent sharing of electrons between 2 covalently bonded atoms. this happens whilst the electronegativity of the atoms is amazingly close. polar covalent is whilst one atoms is an electron hog and would not understand the thank you to proportion okay.