Question

What is the modern periodic law?

Answer 1

Modern periodic table:

• It is defined as the table in which the elements are arranged in groups and periods.
• In the modern periodic table, the elements are arranged according to their increasing atomic number.
• There are $18$ groups and $7$ periods in this periodic table.
• The periods are arranged in horizontal rows.
• The groups are arranged in vertical columns.
• The elements in the modern periodic table are arranged from left to right.

Modern periodic law:

• “This law states that the physical and chemical properties of elements are arranged in increasing order of their atomic numbers in periodic function.”
• The elements are arranged in order of their atomic numbers means that the elements are repeated after the fixed interval with similar physical and chemical properties.