Question

Element 'A' has electronic configuration 2 8 1 and element 'B' has electronic configuration 2 8 2?

A) To which period the element belongs?why?

B) Name the groups to which the element belong?

C) Out of these which element is more reactive? why?​

Answer 1

Answer:

element a belongs to group 1 and period 3

Explanation:

element b belongs to group 2 and period3