Among the statements (I–IV) about Be and Al, the correct ones are:

(I) Be has smaller atomic radius compared to Mg.

(II) Be has higher first ionization enthalpy than Al.

(III) Charge/radius ratio of Be (as Be²⁺) is greater than that of Al (as Al³⁺).

(IV) Both Be and Al form mainly covalent compounds.

Question

Among the statements (I–IV) about Be and Al, the correct ones are:

(I) Be has smaller atomic radius compared to Mg.

(II) Be has higher first ionization enthalpy than Al.

(III) Charge/radius ratio of Be (as Be²⁺) is greater than that of Al (as Al³⁺).

(IV) Both Be and Al form mainly covalent compounds.

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Among the statements (I–IV) about Be and Al, the correct ones are: (I) Be has smaller atomic radius compared to Mg. (II)…