In an atom , L and M shells have the same number of electrons . N shell has one electron less than K shell . Explain the formation of compound by this element and oxygen atom.

In an atom , L and M shells have the same number of electrons . N shel

1.	In an atom , L and M shells have the same number of electrons . N shell has one electron less than K shell . Explain the formation of compound by this element and oxygen atom.
Answer» Solution :Theelectronic arrangement of the element COULD be 2 , 8 , 8 , 1 it corresponds to Z =19 and element is POTASSIUM . Oxygen requires 2 electronic arrangement of 2 , 6 . Potassium loses oneelectron to form K+ ion , oxygen requires 2 electronicto complete its octet . therefore it TAKES 2 electrons from two potassium atoms FORMS `K_(2)O`.