Phosphorus shows greater tendency for catenation than nitrogen. Why ?

How would you account for the following : (i) The electron gain enthalpy with negative sign is less for oxygen than that for sulphur. (ii) Phosphorus shows greater tandency for catenation than nitrogen. (iii) Fluorine never acts as the central atom in polyatomic interhalogen compounds.

(A) complete the following chemical equations : (i) Cu+HNO_(3) (dilute) to (ii) XeF_(4)+O_(2)F_(2)to (B) Explain the following observations: (i) Phosphorus has greater tendency for catentation than nitrogen. (ii) Oxygen is a gas but sulphur a solid. (iii) The halogens are coloured. Why ?

Draw the structures of the following : (i) XeF_(4) (ii) H_(2)S_(2)O_(7) (iii) Structure of SO_(3)^(2-) Exaplain the following observations : (b) Examplain the following observations : (i) Phosphours has a greater tendency for catenation than nitrogen. (ii) The negative value of electron gain enthalpy is less for fluorine than that for chlorine. (iii) Hydrogen fluoride has a much higher boiling point than hydrogen chloride.

Why does sulphur have greater tendency for catenation than oxygen ?

State reasons for each of the following : (i) All the P-Cl bonds in PCl_5 molecule are not equivalent. (ii) Sulphur has greater tendency for catenation than oxygen.