Ionic radius Original Scenario-Based Download PDF

Questions

1. 1.

   Deep-space astrochemical engineers are calibrating a multi-stage molecular sieve to capture charged particles from a stellar plasma stream containing four isoelectronic species: $\text{P}^{3-}$, $\text{S}^{2-}$, $\text{K}^{+}$, and $\text{Ca}^{2+}$. To align the sequential filter membranes from the widest opening to the narrowest opening, the team must determine the precise order of decreasing ionic radius among these ions. Which sequence correctly ranks these ions from largest to smallest ionic radius?

   • A) $\text{P}^{3-} > \text{S}^{2-} > \text{K}^{+} > \text{Ca}^{2+}$
   • B) $\text{Ca}^{2+} > \text{K}^{+} > \text{S}^{2-} > \text{P}^{3-}$
   • C) $\text{K}^{+} > \text{Ca}^{2+} > \text{P}^{3-} > \text{S}^{2-}$
   • D) $\text{S}^{2-} > \text{P}^{3-} > \text{Ca}^{2+} > \text{K}^{+}$