Chemistry 9701 · AS & A Level · Atomic structure

Atomic structure — practice question

Use of the Data Booklet is relevant for this question. For which species are the counts of protons, neutrons and electrons all different?

  • A$^{19}_{9}\text{F}^{-}$
  • B$^{23}_{11}\text{Na}^{+}$
  • C$^{31}_{15}\text{P}$
  • D$^{32}_{16}\text{S}^{2-}$

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