Attempts were made to classify the elements in a number of ways. Most noteworthy of these is that made by Russian chemist, Mendeleef' (men-de-lay-eff) who gave a law known as Mendeleef's Periodic Law which state as:
The properties of elements are a periodic function of their atomic weight, i.e. if the elements are arranged in the increasing order of their atomic weights; the properties of the elements (i.e. similar elements) are repeated after definite regular intervals of periods.
Working on this law, Mendeleef' arranged the elements in the increasing order of their atomic weights in the form of a table which is known as Mendeleef' Periodic Table after his name.
In this table the elements are arranged in groups (or columns) and periods (or rows).
The properties of elements are a periodic function of their atomic weight, i.e. if the elements are arranged in the increasing order of their atomic weights; the properties of the elements (i.e. similar elements) are repeated after definite regular intervals of periods.
Working on this law, Mendeleef' arranged the elements in the increasing order of their atomic weights in the form of a table which is known as Mendeleef' Periodic Table after his name.
In this table the elements are arranged in groups (or columns) and periods (or rows).
