What are the differences between metals and nonmetals. (On the basis of their physical properties)?

Chapter No. 8: Metallurgy,

What are the differences between metals and nonmetals. (On the basis of their physical properties)?

Ans.

Metals
Nonmetals
They are ductile and malleable.
They are brittle. (Except diamond)
They are good conductors of heat and electricity.
They are bad conductors of heat and electricity. (Except graphite)
They are lustrous.
They are non-lustrous. [Except iodine, diamond]
They have high melting and boiling points. (Except sodium, potassium, mercury, gallium)
They generally have low melting and boiling points.