JEE Main · 2022 · Shift-ImediumPERI-006

Element 'E' belongs to period 4 and group 16 of the periodic table. The valence shell electron configuration of the…

Classification of Elements & Periodicity · Class 11 · JEE Main Previous Year Question

Question

Element 'E' belongs to 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:

Options
  1. a

    2s22p42s^2 2p^4

  2. b

    3d10,4s2,4p43d^{10}, 4s^2, 4p^4

  3. c

    3s23p43s^2 3p^4

  4. d

    4d10,5s2,5p44d^{10}, 5s^2, 5p^4

Correct Answerc

3s23p43s^2 3p^4

Detailed Solution

🧠 Group 16, Period 4 is Selenium — one step up is Sulfur Period 4, Group 16 = Selenium (Se). The element directly above it in the same group is Sulfur (S), Period 3.

🗺️ Write the valence config of S Sulfur (Z=16Z = 16): full config 1s22s22p63s23p41s^{2}\,2s^{2}\,2p^{6}\,3s^{2}\,3p^{4}. Valence shell = 3s23p43s^{2}\,3p^{4}.

⚠️ Common mistake Option (b) shows 3d10,4s2,4p43d^{10}, 4s^{2}, 4p^{4} — that is Se itself, not the element above it.

Answer: (c)\boxed{\text{Answer: (c)}}

Practice this question with progress tracking

Want timed practice with adaptive difficulty? Solve this question (and hundreds more from Classification of Elements & Periodicity) inside The Crucible, our adaptive practice platform.

Element 'E' belongs to period 4 and group 16 of the periodic table. The valence shell electron… (JEE Main 2022) | Canvas Classes