Question

Oxygen and Sulphur are kept in the same group, the reason is-
1. No. of electrons in the outermost shell
2. Their atomiticity
3. Their physical state
4. Structure of their molecules

Answer 1

Correct Answer - Option 1 : No. of electrons in the outermost shell

The correct answer is No. of electrons in the outermost shell.

• Oxygen and Sulfur both belong to p- block.
• Sulfur is directly below oxygen in the periodic table, these elements have similar electron configurations.

O (8) = 1s² 2s² 2p⁴

S (16) = 1s² 2s² 2p⁶ 3s² 3p⁴ 

• Sulfur forms many compounds that are analogues of Oxygen compounds.
• So, Oxygen and Sulphur are kept in the same group, the reason is a similar number of electrons in the outermost shell.