elements A, B, C and D have atomic number 1,8,11 and 19 respectively. Choose the odd element and give reason for your answer.

                   K     L     M     N

                  1
 
                  2      6

                  2      8      1  

                 2        8      8        1 

So element 8 is the odd one out becoz element 8 has a valence electron of 6 whereas all has have 1(valence electron).

:)


 

B element is the odd one out.. as A,C,D hav charge of +1 and they are metals but B has charge of -2 so it is a non metal...