19. (a) State five characteristics of metals in five characteristics of nonmetals.
(b) State five uses of metals and five uses of nonmetals.
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a) state five characteristic of mental in
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a) Metals
Shiny
High melting points
Good conductors of electricity
Good conductors of heat
High Density
Non-metals
Dull
Low melting points
Poor conductors of electricity
Poor conductors of heat
Low Density
b)Uses of metals
- Gold, Platinum and silver are used as jewelleries and ornaments.
- Iron and steel are used for construction purpose.
- Aluminium, steel are used as utensils.
- Mercury is used in thermometer and helps to check the temperature.
- Aluminium are used as insulation wires.
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.
- Graphite is used as a good conductor of electricity
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