The elements in the periodic table are arranged in order of increasing atomic number. All the elements in the periodic table are arranged in form of groups or periods. The periodic groups [which are found in the columns] are made up of elements which have similar chemical and physical properties. The periods [which are found in the rows] display the elements in order of increasing atomic number, thus showing the successive occupation of the orbitals in the valence shells of the atoms.
All the members of each group has the same number of electrons in their outermost shells, thus they end up forming the same type of chemical bonds with other elements. The properties of atoms which determine the type of chemical bond that they will form include the following: atomic radius, ionization energy, electron affinity and electronegativity.
Typically, the atomic radius decreases as one move from the left to the right of the periodic table while the the ionization energy increases from left to right.
