Choose the correct statement(s):
A. Beryllium oxide is purely acidic in nature.
B. Beryllium carbonate is kept in the atmosphere of $$CO_2$$.
C. Beryllium sulphate is readily soluble in water.
D. Beryllium shows anomalous behavior.
Choose the correct answer from the options given below:

Let us analyze each statement about beryllium:

A. Beryllium oxide is purely acidic in nature.

This is false. Beryllium oxide (BeO) is amphoteric in nature — it reacts with both acids and bases. It is not purely acidic.

B. Beryllium carbonate is kept in the atmosphere of $$CO_2$$.

This is true. Beryllium carbonate ($$BeCO_3$$) is unstable and decomposes easily. To prevent decomposition, it is stored in an atmosphere of $$CO_2$$, which shifts the equilibrium to prevent the loss of $$CO_2$$ from the carbonate.

C. Beryllium sulphate is readily soluble in water.

This is true. Unlike the sulphates of heavier alkaline earth metals (such as $$BaSO_4$$ which is insoluble), $$BeSO_4$$ is readily soluble in water due to the high hydration energy of the small $$Be^{2+}$$ ion.

D. Beryllium shows anomalous behavior.

This is true. Beryllium is the first member of Group 2 and shows anomalous behavior compared to other alkaline earth metals. It has a very small size, high ionization energy, and high electronegativity. It shows diagonal relationship with aluminum rather than typical Group 2 behavior.

The correct statements are B, C, and D only.

The answer is Option B: B, C and D only.