Which of the following properties of the elements of group $2^{n d}$ (alkaline earth metals) does not increase with increasing atomic number?

Stability of carbonate

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Solubility of hydroxide

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Reactivity with water

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First ionization energy

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Solution

The correct option is C First ionization energy
The alkaline metals have the second lowest first ionization energies in their periods of periodic table because of their low effective nuclear charge and the ability to attain a full outer shell configuration by losing just two electrons.

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Which of the following properties of elements - $C l, B r, a n d I$ increase(s) with the increase in atomic number?

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