What is a row on the periodic table called?

A row on the periodic table is also known as a period. Each period corresponds to the number of electron shells an atom of an element has. The periodic table has 7 rows, or periods, labeled from 1 to 7.

Each period starts with the alkali metals in Group 1 and ends with the noble gases in Group 18. As you move from left to right across a period, the number of protons, electrons, and atomic number of the elements increases. This results in a gradual change in the physical and chemical properties of the elements within a period.

Elements within the same period have similar outer electron configurations, which influences their reactivity and chemical behavior. The periods on the periodic table are used to organize and categorize the different elements based on their properties and characteristics.