Question

electronic configuration of A B C and D are as follows. elements A B C D electronic configuration 2,1 2,8. 2,8,1. 2,8,8. a. in the above which 2 elements to belongs to the same period b.among this which 2 elements do belongs to the same group. c. among A and D which elements are more reactive​

Answer 1

Answer:

1. A and C are 2 elements to belongs to the same period.
2. B and D are 2 elements do belongs to the same group.
3. A is more reactive than D

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