How dould you account for the following :
The stability of +5 oxidation state decreases down the group 15 of the periodic table.

(a) Complete the following chemical reaction equations : (i) P_(4)+SO_(2)Cl_(2) rightarrow (ii) XeF_(4)+ H_(2)O rightarrow (b) Explain the following observations giving appropriate reasons : (i) The stability of + 5 oxidation state decreases down the group in group 15 of the periodic table. (ii) Solid phosphorus pentachloride behaves as an ionic compound. (iii) Halogens are strong oxidizing agents.

Why does the stability of + 3 oxidation state decrease on moving down the group 13 ?

Atomic size increases down a group of the periodic table. Explain.

Name all the elements of group 15 of periodic table.

Ionisation energy increases on moving down a group in the periodic table.

How does the stability of +1 and +3 oxidation states vary in group 13?

Due to inert pair effect, the stability of +2 oxidation state increases on moving down the group 14. Why?

How does valency change within a group of the periodic table?

What are the two important oxidation states of group 6 elements of the periodic table ?

How many groups are present in the long form of the periodic table?