Question

Property of all the alkaline earth metals that increases with their atomic number is:

• A. solubility of their carbonates
• B. thermal stability of their sulphates
• C. ionisation energy
• D. electronegativity

Answer 1

Answer: (B)

thermal stability of their sulphates

With increase in the atomic number of the alkaline earth metals, the thermal stability of sulfates increases.
The ionization energy, the electronegativity and the solubility of the carbonates of the alkaline earth metals decreases with increase in the atomic number.