Question

define valency and illustrate by example of nitrogen & sulphur? ​

Answer 1

Answer:Answer

Valency is the tendency of any atom to from ion by gaining or losing certain number of electrons. It is the number of outermost electrons in the outermost orbit.

Nitrogen has electronic configuration 2,5. So, that it needs 3 more electron to complete its last orbit. Boron has electronic configuration 2,3. So it will lose 3 electrons rather than gaining 5 electrons. Thus the valency of nitrogen and boron is 3.

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Answer 2

Answer:

The maximum number of univalent atoms (originally hydrogen or chlorine atoms) that may combine with an atom of the element under consideration, or with a fragment, or for which an atom of this element can be substituted.