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Metals and Non-metals
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05/09/2021 6:01 pm
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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 to distinguish between, metals and non-metals.
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05/09/2021 6:02 pm
(a) With the help of a hammer, convert both the metal arid non-metal (solid) into plates or rods. Metal will readily form these since they are malleable. Non-metals being brittle will break, when struck with hammer. Now construct a cell in both the cases using these plates as electrodes and switch on the current. If the bulb glows, this means that the electrodes are of metals. In case it does not glow, it means that the electrodes are of non-metals.
(b) From these tests, we conclude that
- Metals are malleable while non-metals are not.
- Metals are good conductors of electricity while non-metals are not (graphite is an exception).