The tenth elements in the periodic table resembles with the

Options :
  1. first period
  2. second period
  3. fourth period
  4. ninth period
Answer and Explanation :-

Answer: Option 2


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By: vivek Kumar ranjan On: Oct/05/2014

10th element is nion and helium is second which both are similar so the answer is second that is helium. Please describe it is someone feels it wrong.

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