NaCl CO2 H2O Al Type of Bond Properties Example Ionic Covalent Chemical Bond Properties Type of Bond Properties Example Ionic 1) Crystalline solids (made of ions) 2) High melting and boiling points 3) Conduct electricity when melted or dissolved in H2O 4) Many soluble in water 5) Generally formed from opposite sides of the periodic table (metals – nonmetals) NaCl Salt Covalent 1) Gases, liquids, or solids (made of molecules) 2) Low melting and boiling points 3) Poor electrical conductors in all phases 4) Many soluble in nonpolar liquids but not in water CO2 Carbon dioxide Polar Covalent 1) Polar covalent molecules are affected by electrostatic fields 2) Have higher melting and boiling points than covalent bonds 3) Good solvent for ionic molecules H2O Water Metallic 1) Good conductors of heat and electricity 2) Bonds are not rigid - malleable and ductile 3) High boiling point 4) Shinny – electrons absorb light and re-emit at a different wavelength Al Aluminum foil