The atom of an element has 9 protons, 9 electrons and 10 neutrons.(i) What is the atomic number of the element?(ii) Predict the valency of the element.
(i) The atomic number of element = Number of protons = 9The element is fluorine (F). (ii) Electronic distribution =2,7(K,L)In order to complete its octet it requires one electron so, valency =8 - 7 = 1The valency of the element is 1.