Question

If 'Z' be the atomic no of some noble gas which of the following combinations of elements having atomic no $Z-1,Z-2,Z+1,Z+2$ form atomic compound?

• A. $(Z-1),(Z+1)$
• B. $(Z-2),(Z+1)$
• C. $(Z-1),(Z+2)$
• D. $(Z-2),(Z+2)$

Answer 1

The correct option is A $(Z-1),(Z+1)$

Noble gases belong to group 18. Atoms with ( Z-1 ) will belong to group 17 which comprises elements that are highly electronegative. These group 17 elements form ionic compounds with highly electropositive elements of group 1 ( here, Z + 1 ).

So, the correct option is '( Z - 1 ), ( Z+ 1 )'.