Question

The elements A, B, C, D and E have atomic number 35, 11, 17, 12 and
13 respectively. Which pair of elements belong to the same group?​

Answer 1

Let us take a look at the electronic configurations of the given elements,

A: (2, 7)
B: (2, 8, 1)
C: (2, 8, 7)
D: (2, 8, 2)
E: (2, 8, 3)

We can see that elements A and C both have 7 valence electrons. Thus, both the elements belong to the same group.
So, A and C belongs to the same group

Answer 2

Answer :

only 35 and 17 in 7th group

11 is in 1st group

12 is in second group

PLEASE MARK AS BRAINLIEST PLEASE