Differentiate metals and non-metals on the basis of following properties:
(a) State
(b) Colour
(c) Lustre
(d) Sonorous
(e) Density
(f) Melting point
(g) Heat conductivity
(h) Malleability
(i) Ductility
Properties of metal:
State: most of the metals are found solid state at normal temperature except mercury (Hg)Which is found in liquid state at normal temperature.
Colour : Mostly metals are grey in colour.
Lustre : Most of the metals are lustrous s such as gold, silver, copper, aluminium.
Sonorous : Most of the metals when struck with other hard metals or objects produce a special sound, this property is called sonorous. Due to this property of metals they are used to manufacture bell and music instrument etc.
Density : generally metals have high density.
Melting point : Melting points of metals are generally high except galium and caesium which have low melting points. They melt on the palm of the hand.
Heat conductivity: Metals are generally good conductors of heat. This is the reason that cooking utensils are made of metals and their handles are made of non-conductors like wood, plastic etc.
Malleability : Metals can be converted into thin sheets by hammering, thus they are malleable.
Ductility : When metals are stretched , convert into wires. This property of metals is called ductility.
Electricity conductivity: Metals allow electricity to pass through them. this property is called conductivity of electricity . silver is the best conductor is electricity.
Properties of Non-metals :
Physical state : They are found three states i.e. solid, liquid and gas at normal temperature such as -solid carbon (C), Sulphur (S), Iodine (I), liquid -bromine (Br) and gas oxygen (O2), nitrogen (N2), hydrogen (H2)
colour: Non-metals have variety of colours such as sulphur (yellow) chlorine gas (greenish yellow), phosphrous (red, white).
Lustre : Non-metals are non lustrous .Iodine is an exception, it is a lustrous non-metal.
Hardness: They are soft . Diamond is exception , it is the hardest nonmetals found on earth.
Sonorous: They do not produce sound.
Density: They have less density.
Melting point : The have low melting point except diamond and graphite .Diamond and graphite (allotropes of carbon) have very high melting point.
heat and electric conductivity: They are bad conductors of heat and electricity except graphite, which is a good conductor of electricity.
Brittle : They break into pieces when beaten with a hammer, thus they are brittle.