Question

write the valancy of the elements having 15 atomic number​

Answer 1

The atomic number of this element is 15, so its electronic configuration will be K L M2, 8, 5. ... 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

The atomic number of this element is 15, so its electronic configuration will be K L M2, 8, 5. ... 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). :)