Which element has a greater reactivity and why?

Question

Sulfur= 16 protons

It is in Group 6 on Periodic table.

 

Calcium= 20 protons

It is in Group 2 on periodic table.

Answer 1

Dear Pam:

 

The question that you pose has no correct answer.  The most reactive element on comparing substances and the individual Standard States and conditions are normally considered to be Lithium metal and Fluorine gas.  A few other substances and their reactions would be considered more reactive, but these are more specialized.

 

Sincerely,

Dr. Bob

Answer 2

They probably have about the same reactivity, though comparison of the two elements can not be done, because they don't react with the same elements, (though calcium can combine with sulfur directly) You are comparing metals with non metals. Calcium is in group 2 as stated and as such "tries" to lose two electrons to make a compound Sulfer, in group 6A "tries" to gain two electrons to make a compound. However, is calcium more apt to try to lose its two electrons then sulfer is more apt to try to gain the two electrons?. Calcium has a slightly larger radius then sulfur which doesn't help us because the larger radius for calcium makes it easier for it to lose its valence (or outer) electrons while the smaller radius of sulfur provides a stronger basis for this element to gain the two electrons is "wants" to complete its shell. Furthermore, because the two because of their valence structure, can NOT combine with the same elements, one could not directly test their reactivity.