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

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
If period number and group number of any representative element $(s)$ are same then which of the following Statement is incorrect regarding such type element $(s)$ in their ground state?
(Period number and group number are according ro modern form of periodic table)
  • A
    The possible value of principal quantum number is $2$
  • B
    The posstble value of azimuthal quantum number is zero
  • ✓
    The possible value of magnetic quantum number is $1$
  • D
    The species could be paramagnetic
✓

Answer

Correct option: C.
The possible value of magnetic quantum number is $1$
c
$(c)$ 

  Possible elements Period number Group number Electronic configuration
$(i)$ $H$ $1$ $1$ $1s^1$
$(ii)$ $Be$ $2$ $2$ $1s^2 \,2s^2$

 

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