Question

12. The elements A, B, C, D and E have atomic numbers 9, 11, 17,12 and 13
respectively. The pair of elements which belongs to the same group of the
periodic table is:
(a) A and B (b) Band D (c) A and C
(d) D and E
OR
The electronic configurations of three elements X, Y and Z are:
X:2
Y: 2,87
Z: 2,8,2
Which of the following is correct regarding these elements?
(a) X is a metal
(b) Y is a metal
(c) Z is a non-metal
(d) Y is a non-metal and Z is a metal​

Answer 1

Answer:

B and D because they have same number of electrons in there outer shell

Answer 2

$\huge\blue{\overbrace{\blue{\underbrace{\color{blue}{{ \blue\:{HelloBuddy}}}}}}}$

12. The elements A, B, C, D and E have atomic numbers 9, 11, 17,12 and 13

respectively. The pair of elements which belongs to the same group of the

periodic table is:

(a) A and B

(b) Band D ✅✅✅✅

(c) A and C

(d) D and E