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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
Element $"E"$ belongs to the period $4$ and group $16$ of the periodic table. The valence shell electron configuration of the element, which is just above $'E'$ in the group is $.....$
  • ✓
    $3 s ^{2} \cdot 3 p ^{4}$
  • B
    $3 d ^{10} \cdot 4 s ^{2}, 4 p ^{4}$
  • C
    $4 d ^{10} \cdot 5 s ^{2}, 5 p ^{4}$
  • D
    $2 s ^{2}, p 4$
✓

Answer

Correct option: A.
$3 s ^{2} \cdot 3 p ^{4}$
a
$E \Rightarrow[ Ar ] 3 d ^{10} 4 s ^{2} 4 p ^{4}$

Element above $E \Rightarrow[ Ne ] 3 s ^{2} 3 p ^{4}$

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