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

Atomic structure and the Periodic Table — practice question

Which particle has an equal number of neutrons and electrons?

  • A$^{40}_{20}\text{Ca}^{2+}$
  • B$^{24}_{12}\text{Mg}^{2+}$
  • C$^{19}_{9}\text{F}^{-}$
  • D$^{32}_{16}\text{S}^{2-}$

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI