Chemistry 0620 · IGCSE · Atomic structure and the Periodic Table

Atomic structure and the Periodic Table — practice question

Gas G contains 10 electrons. Gas H contains eight additional electrons compared with gas G. Both gases are monoatomic. Which statement about G and H is correct?

  • ABoth gases are in the same group of the Periodic Table.
  • BBoth gases are in the same period of the Periodic Table.
  • CBoth gases are very reactive.
  • DGas G has a higher atomic mass than gas H.

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