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STD 11 - 3. Classification of elements and periodicity in properties — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 3. Classification of elements and periodicity in properties4 Marks
MCQ
The tenth elements in the periodic table resembles with the
  • A
    First period
  • ✓
    Second period
  • C
    Fourth group
  • D
    Ninth group
✓

Answer

Correct option: B.
Second period
b
$(b)$ Each period consists of a series of elements whose atom have the same principal quantum no. $(n)$ of the outer most shell i.e. In second period $n = 2$, this shell has four orbitals (one $2s$ and three $2p$) which can have eight electrons, hence second period contains $8$ elements from atomic no. $3$ to $10.$

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