The main group elements i.e. representative elements complete their electron configuration using s and p electrons in the periodic table. These elements range from the most metallic to the most non-metallic with intermediate properties, the semi-metals, in between .The elements which occur at the two extremes of the periodic table are highly reactive and therefore, these highly reactive elements do not occur in free state : they usually occur in the combined forms. Select the correct statement (this is with respect to the elements of main group).

The main group elements i.e. representative elements complete their el

1.	The main group elements i.e. representative elements complete their electron configuration using s and p electrons in the periodic table. These elements range from the most metallic to the most non-metallic with intermediate properties, the semi-metals, in between .The elements which occur at the two extremes of the periodic table are highly reactive and therefore, these highly reactive elements do not occur in free state : they usually occur in the combined forms. Select the correct statement (this is with respect to the elements of main group).
Answer» Chemical reactivity of the elements is generally lowest in the centre of a period Oxides of the elements in the centre of period in general are amphoteric or neutral Metallic character increases with increasing atomic number in a GROUP where as decreases from left to right in a period All of these Solution :(A)Have intermediate values of ionisation energy and electron affinity. (B)Generally the elements found in the centre of period for main group elements are metalloids.They generally FORM amphoteric oxides. (C )Down the group size of ATOM increases and ELECTROPOSITIVE character increase.So metallic character increases. ACROSS the period , size of atom decreases and electropositive character decreases.So metallic character decreases and non-metallic character increases.