Question

what is the valency of element having atomic number 5 to 15​

Answer 1

3

It has 5 electrons in its outermost shell, so it needs 3 more electrons to complete the eight electron, inert gas configuration. Since one atom of this element needs 3 electrons to achieve the inert gas electron configuration, therefore, its valency is 3. (The element having atomic number 15 is actually ? phosphorus)

Answer 2

Explanation:

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