Chemistry

Problem

The correct order of radii is: a.

\text{N} < \text{Be} < \text{B}

\text{F}^- < \text{O}^{2-} < \text{N}^{3-}

\text{Na} < \text{Li} < \text{K}

\text{Fe}^{3+} < \text{Fe}^{2+} < \text{Fe}^{4+}