Atoms and Periodic Table

Prime purpose of this lecture is to describe on Atoms and Periodic Table. The Periodic Table naturally made by scientists by solid, liquid, gas and metal, non-metal form.  The Periodic Table lists the chemical elements in increasing  atomic number. The Periodic Table arranges elements with similar chemical properties in  groups (vertical columns). All the elements in a group have similar chemical properties as they have  the same number of outer electrons..