Chemistry 0620 · IGCSE · Atomic structure and the Periodic Table

Atomic structure and the Periodic Table — practice question

A diagram of an atom is shown. Which row gives the nucleon number and proton number for this atom?

  • Anucleon number $9$, proton number $10$
  • Bnucleon number $19$, proton number $10$
  • Cnucleon number $10$, proton number $9$
  • Dnucleon number $19$, proton number $9$

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