Question

sodium magnesium and Aluminium are the elements of the 3rd period of modern periodic table having the group number 1 ,2 and 13 respectively which one of these element has maximum chemical reactivity justify your answer stating the reason of for each

Answer 1

chemical reactivity is more in group 1 becoz...valency of these elements is 1. they try to lose this e- to satisfy their octet.hence sodium has max. chemical reactivity. hope this helps you!!

Answer 2

reactivity of metals depends upon their ability to lose their valence electrons.The element with greater atomic size will lose electrons most easily. Across a period ,atomic size decreases.So Na ,having the largest size,loses electrons most easily and hence is most reactive.

Hope this helps!