Question

The electron configuration of element 'A' is 2, 8, 1 and that of 'B' is 2.8, 2.
Then which element is more reactive? Write the reaction of both the
elements with dil HCI acid.​

Answer 1

Metal 'B' is more reactive than Metal 'A'.

For Metal A:-

Na + HCl ―> NaCl + H2

Mg + HCl ―> MgCl2 + H2