Among the statements


Among the statements $(\mathrm{I}-\mathrm{IV})$, the correct ones are:

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

(II) Be has higher ionization enthalpy than $\mathrm{Al}$.

(III) Charge/radius ratio of Be is greater than that of $\mathrm{Al}$.

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


  1. (I), (II) and (IV)

  2. (II), (III) and (IV)

  3. (I), (II) and (III)

  4. (I), (III) and (IV

Correct Option: , 3


$\mathrm{I}, \mathrm{A}_{\mathrm{N}}: \mathrm{Be}<\mathrm{Mg}$

II IE : Be > Al

III Charge/radius ratio of Be w less than that of Al

IV Be, Al mainly form covalent compounds


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