Question

Which property of group 2 elements ( magnesium to barium) and their compounds increases with an increasing proton (atomic) number?
A)the magnitude of the enthalpy change of hydration of the metal ion
B)the pH of the aqueous chloride
C)the solubility of the sulphate in water
D)the stability of the carbonate to heat
E)the tendency to form complex ion ?

Kindly answer this , alongwith the explanation.
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Answer 1

I responded to this earlier and I gave you a link that gives you that answer.