Examine elements of the third period : Na, Mg, Al, Si, P, S, Cl, Ar and answer the following :
(a) Choose (i) Metals and (ii) Non-Metals out of these elements. (b) On which side of the periodic table can we locate (i) Metals and (ii) Non-Metals ?
(c) Name the Metalloid out of the elements given above. Where are they located in the periodic table ?