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Question

(a) State five characteristics of metals and five characteristics of non-metals.

(b) State five uses of metals and five uses of non-metals.

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Solution

(a) The characteristics of metals

  • good conductors of heat and electricity
  • ductile (can be drawn into wires) and malleable (can be hammered)
  • metals are solid at room temperature (except Mercury, it is a liquid state)
  • high tensile strength
  • usually lustrous/shiny

(b). The characters of non-metal are as follows.

  • poor conductors of heat and electricity (except graphite).
  • non-metals are brittle in nature
  • non-metals are solid, gas at room temperature (except Bromine, it is a liquid state)
  • Low tensile strength
  • usually dull looking (except Diamond), do not show malleability and ductility.

Uses Of Metals:

★ -used in manufacturing automobiles, machinery, trains, satellites, aeroplanes, industrial gadgets.

★ -used in making wires, electrical appliances, circuits and many more.

★ -used in making utensils, water boilers.

★ - used to prevent the rust formation (Zinc is mainly used as a protective coat for iron).

★ - used in making thermometer (Hg).

Uses Of Non-Metals:

★ Oxygen is used for breathing.

★ Chlorine is used for purifying water.

★ Phosphorous is used in crackers.

★ Non - metals like nitrogen is used in fertilizers.

★ Iodine is used widely as an antiseptic which prevents the growth of the microorganism and used mainly to clean cuts and wounds.


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