Question

Elements A, B, C, D and E have the following configuration-
A-2,3
B-2,8,3
C-2,8,7
D- 2, 8,5
E- 2, 8, 8,2
(i) Which of these are from same group?
(ii) Which of these are from same period?
(iii) Write the group no. of element A and D.
(iv) Write the formula of the oxide formed by element B.
(v) Identify the element C and D.​

Answer 1

please refer the table

Explanation:

the table which I mean is that periodic table,...

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