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Q.

The period that includes all blocks of elements is

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answer is 6.

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Detailed Solution

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  • All blocks of Element present in 6th period because in this group-s, p, d and f subshells are included.
  • The sixth period (n = 6) contains 32 elements and successive electrons enter 6s, 4f, 5d and 6p orbitals, in the order — filling up of the 4f orbitals begins with cerium (Z = 58) and ends at lutetium (Z = 71) to give the 4f-inner transition series
    which is called the lanthanoid series.
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