1.

Which among the following set of elements contain same number of valence electrons?

Answer»

`""_(11)^(23)X,""_(20)^(40)Y`
`""_(10)^(20)X,""_(19)^(39)Y`
`""_(11)^(23)X,""_(19)^(39)Y`
`""_(18)^(40)X,""_(26)^(40)Y`

Solution :`""_(11)^(23)X,""_(19)^(39)Y` have ONE valence electron as they are sodium and potassium with electronic arrangements2,8,1 and 2,8,8,1 RESPECTIVELY.


Discussion

No Comment Found