Metals and Non-Metals -I
An element is a substance made up of same type of atoms. Elements can be classified into metals, non-metals and metalloids on the basis of their properties.
Metals are the elements which have various properties such as lustre, ductility, malleability, sonority and electrical and thermal conductivity etc. Examples of metals are copper, gold etc.
Metals are mostly solid at room temperature except mercury and gallium which are liquids at room temperature.
Non-metals have properties opposite to that of metals. These are the elements which are non-lustrous, bad conductors of heat and electricity, non-malleable, non-ductile and non-sonorous. They have low melting and boiling point. Examples of non-metals are sulphur, carbon etc.
Non-metals exist as solid, liquid or gas at room temperature.
Metals and non-metals are used for various purposes.
Metals are used in making machinery, automobiles, trains, aeroplanes, satellites, jewellery etc.
Non-metals are also useful to us. Oxygen is used for respiration and combustion. Red phosphorus is used in match box industry. Neon is used in signs and produces bright reddish-orange light.