Different lines of the elements mentioned period. Some period of an element signifies the highest energy level of electrons in the element occupies (in the unexcited state). The number of electrons in a period increases as one across the bottom of the periodic table, so that as the atomic energy levels increase, the number of sub-levels of energy per energy level increases.
Using the data in the table scientists, students, and others familiar with the periodic table can extract information about individual elements. For example, a scientist can use the mass of the carbon atoms to determine how many carbon atoms in 1 kg of carbon blocks.

People also get information from the periodic table to see how put together. By examining the position of elements on the periodic table, we can infer the electron configuration. Elements located in the same column of the periodic table (called “Group”) have an identical electron configuration and consequently mosquito nets behave in the same way chemically. For example, all the elements of an inert gas 18. The periodic table contains a large amount of important information. People who are familiar with how the table is put together can quickly determine the amount of information about an element, even if they never heard about it.