Chemistry 5070 · O Level · Atomic structure and the Periodic Table

Atomic structure and the Periodic Table — practice question

A particle has 34 protons, 45 neutrons and 36 electrons. Which symbol correctly represents this particle?

  • A$^{79}_{34}\text{Se}$
  • B$^{79}_{34}\text{Se}^-$
  • C$^{79}_{34}\text{Se}^{2-}$
  • D$^{79}_{34}\text{Se}^{2+}$

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