Question

which of the following pair of atomic numbers is in the same group ? a) 11,19. b)6,12. c)4,16. d) 8,17​

Answer 1

Explanation:

11 and 19

hope its helpful

Answer 2

Answer:

Pair of atomic numbers which belongs in the same group must have same valency number

The most appropriate option of the given question is option C let's check it out

11 = 2,8,1

19=2,8,8,1

Clearly we can see that there is one electron present in both the elements in their outermost cell so we can consider these two atomic numbers belongs to the same group