In the modern periodic table, the elements are arranged accordingly with the increasing no. of atomic number (no. of protons) from first hydrogen to the 118th element.This periodic table reveals many properties of elements periodically.The basic periodical properties, that we can gain from this table are as follows.
1) Size of the atom.
2) Atomic radii
3) Ionization potential
4) Electro negativity and
5) Electron affinity
Size of the atom: