There are just over 100 different elements known at this time. The Periodic Table is a list of all of the known elements. They are arranged in a table according to characteristics or properties that they have in common. Metals are placed on the left side of the Periodic Table. There is a jagged dividing line on the right side of the Periodic Table.
Metals are on the left of the line.
So even though we say that metals are on the left, what we really mean is that they are on the left of the line jagged dividing line. Members of each Group or Family on the Periodic Table have the same number of electrons in their outer energy level . Elements at the top of the Periodic Table have the fewest number of electron energy levels . They are the whole list, from top to bottom, on the far right side of the Periodic Table. The Noble Gases are Helium, Neon, Argon, Krypton, Xenon, and Radon.