Question

Which of the three elements be mg and ca will be most reactive give reasons?

Answer 1

Ca will be most reactive
Ca has to lose 2 electrons from its 3rd shell which is easier than to lose 2 electrons of mg from the 2nd shell

Answer 2

In the reactivity series,ca is the third element in the desending order of reactivity

The series is as follows

K

Na

Ca

Mg

Al

Zn

Fe

Pb

H

Cu

Hg

Ag

Au

Here Au is least reactive and K is most reactive..

So learn this table well before the exams