Have you ever wondered how the periodic table came to be? The periodic table is the place where you can find every element that had been discovered so far. There were three big changes to the periodic table and those three changes is what I will be talking about. These new changes to the periodic table has been due to recent discoveries like noble gases.
The first periodic table was cylinder like. The table had helical graph wrapped around the cylinder. The list was published without any graph and It also used geological terms, it also included compounds on the list. Since it was published with things like this the table itself was completely ignored until the work of mendeleev.
The second periodic table was organized into groups of three called triads. A triad is three elements that are similar so they were grouped together based on that. The table had all of the known elements at the time which was 62. All similar elements were put into a single column even if two elements were going to be in a single box. The table left no room on it for any newly discovered elements.
The discovery of the proton made this the most modern and accurate of the versions of the periodic tables I have talked about. The discovery of the proton led to the discovery of the nuclear charge (atomic number). The atomic number (number of protons) changed the organization of the table to fit that way going from 1 to 10 and so-on. The periodic table was based on the periodic law.
The periodic table has changed a lot due to recent and not-so recent discoveries by amazing people who have change the world a lot. These changes occurred after someone made a discovery which in turn could lead to more discoveries like plutonium and the noble gases. We have to change the periodic table a lot because we have to get the most accurate data possible so we don’t make false discoveries.
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