Chemistry 0620 · IGCSE · Atomic structure and the Periodic Table

Atomic structure and the Periodic Table — practice question

Which two particles possess identical electronic structures?

  • A$\text{C}$ and $\text{O}^{2-}$
  • B$\text{F}^-$ and $\text{Na}$
  • C$\text{K}^+$ and $\text{S}^{2-}$
  • D$\text{Mg}$ and $\text{Na}^+$

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