The correct order of radii is: \( \mathrm{P} \) (1) \( \mathrm{N}\mathrm{Be}\mathrm{B} \) W (2) ...

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The correct order of radii is:
\( \mathrm{P} \)
(1) \( \mathrm{N}\mathrm{Be}\mathrm{B} \)
W
(2) \( \mathrm{F}^{-}\mathrm{O}^{2-}\mathrm{N}^{3-} \)
(3) \( \mathrm{Cs}^{+}\mathrm{O}^{2-}\mathrm{F}^{-} \)
(4) \( \mathrm{Fe}^{2+}\mathrm{Fe}^{3+}\mathrm{Fe}^{4+} \)
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