Chemistry 0620 · IGCSE · Ions and ionic bonds

Ions and ionic bonds — practice question

The electronic structures of atoms Q and R are displayed. Q and R combine to make an ionic compound. What is the formula of this compound?

  • A$\text{QR}_7$
  • B$\text{Q}_2\text{R}_4$
  • C$\text{QR}$
  • D$\text{Q}_7\text{R}$

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