1.

Two elements X and Y have following electronic Configurations\[X:1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{2}}\,3{{s}^{2}}\,3{{p}^{6}}4{{s}^{2}}\]\[Y:1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{6}}\,3{{s}^{2}}\,3{{p}^{5}}\]The expected compound formed by combination of X and Y will be expressed as 

A. \[X{{Y}_{2}}\]            
B. \[{{X}_{5}}{{Y}_{2}}\]
C. \[{{X}_{2}}{{Y}_{5}}\]          
D. \[{{X}_{{}}}{{Y}_{5}}\]  
Answer» B. \[{{X}_{5}}{{Y}_{2}}\]


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