question_answer 20)

                You are given a hammer, a battery; a bulb, wires and a switch :          (a) How could you use them to distinguish between samples of metals and non-metals? (b) Assess the usefulness of these tests in distinguishing between metals and non-metals. 

Answer:

(a) Metals can be hammered to form sheets. Non-metals cannot be broken down into sheets.   (b) By making an electrical circuit it can be tested for the electrical conductance of metal and non-metals.