The are multiple numbers in the periodic table, these are the group numbers, period numbers, atomic mass, electron and the atomic number
Group numbers, are what we see vertically in the periodic table.
Period numbers, are what we see horizontally in the periodic table.
Atomic Number, is what we see over the symbol of every element and it is the number of protons.
Atomic Mass, is what we see under the symbol of every element and it is the mass of an element.
Electron, is what we see on the top right of every element's block or at the right side of the element symbol.