Question

Define the modern periodic law. Discuss the construction of the long form of the periodic

table​

Answer 1

"Define the modern periodic law."

"Modern periodic law: The Modern periodic law states “The chemical and physical properties of elements are a periodic function of their atomic numbers”."

"Discuss the construction of the long of the periodic table. Modern periodic law: The Physical and chemical Properties of the elements are the periodic functions of their Electronic Configurations. i) The modern periodic table has eighteen vertical columns known as groups and seven horizontal rows known as periods."

Answer 2

Modern Periodic Law: This law states that, the physical and chemical properties of the elements are the periodic function of their atomic numbers'. Main features of the long form of the Periodic Table are given as below: (i) This periodic table has 18 vertical columns called the groups, which are numbered from 1 to 18.