Ionic: contains ions, strong electrostatic forces between oppositely charged ions, usually metal and non-metal, high melting and boiling points, giant ionic lattice, conducts electricity when molten or in solution, NaCl, MgO, K2S, NH4OH, Covalent: contains atoms or molecules, strong electrostatic forces between the shared electron pair and the positive nuclei, non-metals only, mainly low melting and boiling points, simple molecular or giant covalent, does not conduct electricity (except graphite), CO2, NH3, CH4, Graphite and Diamond,

Properties of ionic and covalent

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