The electronic configuration of an element Z is 2, 8, 8.
(a) What is the atomic number of the element?
(b) State whether element Z is a metal or a non-metal.
(c) What type of ion (if any) will be formed by an atom of element Z? Why?
(d) What is special about the outermost electron shell or the atom of this element?
(e) Give the name and symbol of element Z.
(f) Name the group of elements to which Z belongs.
(a) The atomic number of the element Z is 18.
(b) Element Z is a non-metal.
(c) By an atom of element Z the ion formed will be anion. This is because it has completely filled shell due to which it can neither lose or gain electron.
(d) The outermost electron shell or the atom of this element is completely filled with electrons. It has its noble gas configuration.
(e) The name of the element is argon. And its symbol is Ar.
(f) The group of elements to which Z belongs is noble gas or can say inert gas.