28.) a solid has a definite shape and a definite volume. 29.) <span>These two opposite </span>ions<span> attract each other and form the </span>ionic bond<span>. </span>Covalent bonding<span> is a form of chemical </span>bonding between<span> two non metallic atoms which is characterized by the sharing of pairs of electrons </span>between<span> atoms and other </span>covalent bonds<span>.</span> 30.) scientists use scientific notation to help shorten long numbers. an example is 23^7. 31.) one example of a chemical change is change in color.
