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Question

What is the valency of sulphur?


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Solution

Valency:

  • An element’s combining capacity is known as its valency.
  • The valency of the element represents the number of bonds that an atom can form as part of a compound.

How to find the valency of an element:

  • The valency of an element depends on the electrons present in the outermost shell, that is, valence electrons.
  • An element always tries to attain stability by gaining or losing electrons to obtain the octet (8 electrons in the outermost shell). So the number of valence electrons can vary from 1 to 8.
  • If the valence electrons of the element vary from 1 to 4. Then, the valence of electrons itself is their valency.
  • If the valence electrons are more than 4, subtract the number of valence electrons from the 8 (octet).

Valency of sulphur

  • The atomic number of sulphur is 16. The electronic configuration of sulphur is 1s22s22p63s23p4.
  • The valence electrons of sulphur are six. Thus, sulphur needs 2 more electrons to achieve the octet.
  • Therefore, the valency of sulphur is 2.

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