Question

In the long form of periodic table which period is:

Longest and incomplete

Answer 1

Long-form of Periodic Table: In the long form of the periodic table, elements are arranged in the order of their increasing atomic number in the tabular form.

• The horizontal rows are called periods.
• The vertical columns are called groups.
• It has 18 groups or families and 7 rows or periods.

The 7^th period is the longest and most incomplete period in the long form of the periodic table.

• It contains 32 elements.
• Initially, this period consist of elements that were yet to be discovered.
• Also, it is called incomplete because the properties of these elements have not been studied thoroughly yet and more information is required to understand these elements properly.