Question

The element A, B, C, D and E have atomic
number 9,11,17,12 and 13 respectively
which pair of elements belong to the same group.
(a) A and B
(b) B and D (c)A andC
(d)Dand E​

Answer 1

Answer: ∞The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belongs to the same group ? Elements which differ in atomic number by 8 i.e., 9 (A fluorine) and 17 (Cl, chlorine) lie in the same group i.e., group 17 (halogens).

Answer 2

Answer:

c) A and C

Explanation:

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