Question

What is the basis of Modern periodic law?

Answer 1

We need to understand about the modern periodic law and summarize the basis of its existence. In order to achieve an increasing number of atomic elements, Mendeleev and Moseley is the main source of current periodic law: their chemical and physical characteristics are periodically repeated.

Complete answer:
We need to know that the characteristics of the element and its compounds according to modern periodic law are regularly determined by the atomic numbers. In placing atomic atoms, then after a predictable period, identical electronics are performed. According to the increasing atomic number, Z, elements are therefore arranged in the periodic table. This is the basis of the Modern Periodic Law. The modern or long form of the periodic table is based on the modern periodic law. The table is the arrangement of elements in increasing order of their atomic numbers. The modern periodic table is the present form of the periodic table. It consists of 18 vertical columns and 7 horizontal rows. Groups are the vertical columns in the modern or long form of the periodic table. We have to remember that the periods are the horizontal rows in the modern or long form of the periodic table.

Note:
We must note that there exists a basic difference in approach between the Mendeleev’s and the Modern Periodic Law. Mendeleev’s Periodic Law states that the properties of elements are periodic functions of their atomic weights. Whereas, the Modern Periodic Law states that the properties of elements are periodic functions of their atomic numbers.