How does sulphur exhibit a valency of 2,4 and 6?
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Explanation:
Oxygen is divalent, but sulphur exhibits variable valency of 2, 4 and 6 because of the presence of d-orbitals in sulphur.
In sulphur, the excitation of np-electrons to nd-sub-shell gives rise to increase in number of unpaired electrons.
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The valency will be 2. The atomic number of sulphur is 16 and the thing which you have written is its distribution of electrons in K, L and M shells as per Bohr's atomic model. As the valenced shell has 6 electrons, it will need just 2 more electrons to complete its octet. So, valency will be 2. Due to this, there will be a relative charge difference of -2. This is also the reason why sulphur forms sulphide ion (di-negative suphuric ion).
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