Question

Answer the following questions regarding the modern version of Mendeleev's periodic table.

What is the sixth period commonly called and why?

Answer 1

The sixth period is commonly called the longest period.

• This is because it contains the maximum number of elements as compared to the other periods.

Periods: The horizontal rows in Mendeleev's periodic table are known as periods.

• Mendeleev originally called these periods a series.
• The number of periods present in a modern version of Mendeleev's periodic table is 7.
• In Mendeleev's periodic table, elements were arranged in the order of the increasing atomic weights.
• The elements were arranged in the form of vertical columns called groups and horizontal rows called periods.