question_answer

Two elements X and Y have following electron configurations  X \[=1{{s}^{2}},\,\,2{{s}^{2}}2{{p}^{6}},\,\,3{{s}^{2}}3{{p}^{6}},\,\,4{{s}^{2}}\] and Y \[=1{{s}^{2}},\,\,2{{s}^{2}}2{{p}^{6}},\,\,3{{s}^{2}}3{{p}^{6}}\] The compound formed by combination of X and Y is [DPMT 2001]

A)                 \[X{{Y}_{5}}\]    

B)                 \[{{X}_{2}}{{Y}_{5}}\]

C)                 \[{{X}_{5}}{{Y}_{3}}\]     

D)                 \[X{{Y}_{2}}\]