The Periodic Table, whose full name is the Periodic Table of Chemical Elements, also known as the Mendeleev Periodic Table, is a method of listing chemical elements into a tabular form, based on atomic numbers (number protons in the nucleus), electron configuration and their periodic chemical properties. Elements are represented in ascending atomic order, often listed with their chemical symbol in each cell. The standard form of the table consists of elements arranged in 18 columns and 7 rows, with two separate double rows at the bottom.
The rows in the table are called cycles, while the columns are called groups, some with specific names such as halogens or noble gases. Because by definition a periodic table showing periodic trends, any table of form can be used to infer the relationship between element properties and predict the properties of new elements. , has not been discovered or synthesized. Thus, a periodic table – whether in standard or variant form – provides a useful framework for the analysis of chemical properties, and such tables are widely used in chemistry and the sciences. other.