there is a large group of materials P which all the divided into three groups Q ,R and S on the basis of their properties ,THe substance belonging to group Q can be solids liquids or gases ,The solids belonging to group Q arae usually electrical insulators Most of the substance of groups R are solids which are good like R. the properties of s are intermediate between those of Q and R.
(a) what could the group of materials Pbe ?
(b) Name the substance Q GIve two example of such substance.
(c ) Name the substance R write two example of such substance .
( D) Name the substance S . Give two example of such substance .
( e) out of Q ,R and S , which substance are malleable and ductile ?

Answer

(a) Element (b) non- metals ;carbon and sulphur ( c) metals ; copper and Alumionium (d) Metalloids ; Boron and silicon ( e) susbtance r ( metals )