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  • Matter - Nature and Behaviour : Periodic Classificat...
  • Which of the following elements will be present in the sh...
Multiple choice

Which of the following elements will be present in the shortest period?

  1. Hydrogen and lithium

  2. Hydrogen and helium

  3. Lithium and helium

  4. Beryllium and helium

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The 1st period is the shortest period and contains hydrogen and helium.

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