Question

Atomic number of an element À is 18
and that of B is 19. Write their
electronic configuration, which one will
be more reactive chemically and why?​

Answer 1

Explanation:

Atomic no. 18 is argon and 19 is potassium...

potassium will be more reactive because it is located in left side of periodic table, it means it is a metal whereas argon is located at right side of periodic table means it is a non metal.And metals are more reactive than non metals

Answer 2

Answer:

hey mate here is your answer

Explanation:

atomic number of element A is 18 and configuration is 2,8,8. on the other hand the element of B is 19 and it's electronic configuration is 2,8,8,1

therefore, we can see in this situation that element B is more reactive than element A because this element contains higher electronic configuration.