question_answer

Consider the following three compounds (i) \[AX_{2n}^{n-}\], (ii) \[A{{X}_{3n}}\] and (iii) \[AX_{4n}^{n+},\], where central atom A is 15th group element and their maximum covalency is 3n. If total number of proton in surrounding atom X is n and value of n is one, then calculate value of\[''{{x}^{3}}+{{y}^{2}}-z''\]. (Where x, y and z are total number of lone pair at central atom in compound (i), (ii) and (iii) respectively.

Answer:

9