The number of elements in the 2nd period of periodic table is 

The number of elements in the 2nd period of periodic table is 

  1. A

    1

  2. B

    2

  3. C

    8

  4. D

    18

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    Solution:

    2nd period is related with filling of one orbital 2s and three orbitals of 2p, i.e., total four orbitals. Hence, total elements in 2nd period = 2 × 4 = 8

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