Preview each experiment you will preform. For each experiment, is the change that occurs physical, or is it chemical? How will you be able to tell what type of change took place?

well it depends on what change you prefure to happen but for further information look below U3U

Explanation:

Physical changes are changes affecting the form of a chemical substance, but not it's chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. into chemical elements or simpler compounds.

a polar bond is formed when electrons are shared unevenly between atoms