Question

19. (a) State five characteristics of metals in five characteristics of nonmetals.
(b) State five uses of metals and five uses of nonmetals.

Answer 1

Answer:

a) state five characteristic of mental in

Answer 2

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