Valency of oxygen is generally two whereas Sulphur shows valency of two, four and six. Explain.

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Hint:. In oxygen, there are no vacant orbitals for the excitation of electrons whereas on the other hand, such orbitals are present in case of Sulphur where it can excite its electrons. Now on this basis, you can answer the given statement.

- Oxygen has the atomic number as 8 and mass number as 16. The general electronic configuration of oxygen atom is as: $1{{s}^{2}}2{{s}^{2}}{{p}^{4}}$ and requires two electrons to complete its octet.
- On the other hand, Sulphur has the atomic number as 16 and mass number as 32. The general electronic configuration of Sulphur atom is as: $1{{s}^{2}}2{{s}^{2}}{{p}^{6}}3{{s}^{2}}{{p}^{4}}$ and requires two electrons to complete its octet.