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

Atomic structure and the Periodic Table — practice question

The table lists the proton numbers for four elements, Q, R, T and Z: Q = 9, R = 11, T = 17, Z = 19. Which statement is the correct one?

  • AQ is a metal.
  • BQ is more reactive than T.
  • CR is more reactive than Z.
  • DT and Z are in the same period.

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