Chemistry 9701 · AS & A Level · The Periodic Table: chemical periodicity

The Periodic Table: chemical periodicity — practice question

Element X has the second-largest atomic radius within its period. A neutral atom of X contains only three occupied electron shells. The oxide of X is mixed with water by shaking. What might be the $\text{pH}$ of the solution formed?

  • A5
  • B7
  • C9
  • D14

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