MCQ
The smallest among the following ions is
- A$N{a^ + }$
- B$M{g^{ + 2}}$
- C$B{a^{2 + }}$
- ✓$A{l^{3 + }}$
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(Molar mass of $Fe =56\, g\, mol ^{-1}$ )
$(I)$ $Be$ has smaller atomic radius compared to $Mg$
$(II)$ $Be$ has higher ionization enthalpy than $Al.$
$(III)$ Charge/radius ratio of $Be$ is greater than that of $Al$.
$(IV)$ Both Be and $Al$ form mainly covalent compounds.

