Mendeleev ultimately succeeded in his endeavor and wrote the definitive chemistry book of his time, titled “Principles of Chemistry”, which was made into two volumes. We could try understanding what Mendeleev went through by giving the analogy of a tough jigsaw puzzle with half the pieces bent out of shape. At that time, less than half the current elements were known, and some of those elements that were present had the wrong data. However, this wasn’t as straightforward as one might imagine in the time of Mendeleev, as there were numerous obstacles to overcome. This is because new elements have either been discovered or made by man, and later added to the periodic table.īefore we dive into the intricacies of the periodic table, let’s first take a walk down memory lane.ĭmitri Mendeleev (Photo Credit: Public Domain/Wikimedia Commons)

The arrangement of the periodic table has changed over time since its inception. Each of these elements is specifically placed in the periodic table, keeping specific parameters in mind. The arrangement of the periodic table was formulated in order to give a very informative representation of the chemical elements. The elements in a period have the same number of electron shells. The elements in a group have the same number of electrons in their outermost orbital. The periodic table is also arranged by groups and periods. The elements are arranged in order of increasing atomic number.

The periodic table is arranged by atomic number, which is the number of protons in an element’s nucleus. Dmitri Mendeleev – Father of the Periodic Table.

Table of elements