Question

What is the modern periodic law? Describe briefly the long form of the periodic table

Answer 1

modern periodic law

the physical and chemical properties of the elements are the periodic functions of their atomic number or electron configuration
the modern periodic table has 18 vertical columns known as groups and 7 horizontal rows known as periods

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Answer 2

Periodic classification of elements are present form of periodic table long form based on the modern periodic law the elements are arranged into rows and columns based on their atomic number. The groups represent elements with the same number of electrons in their outer most shell called the valence shell.