Question

Will an element with atomic number 11 be more reactive or will an element with atomic number 12 be more reactive?

Answer 1

Sodium is more reactive than magnesium. Sodium has 2,8,1 electronic configuration which is ready to loose its one electron to attain the stability. So its more reactive. Magnesium has 2,8,2 configuration which will not loose its electron from the stable configuration. That is why sodium is more reactive than magnesium.