The school transition process, in the middle of elementary school, is, for many students, marked by the inclusion of additional subjects from the Natural Sciences, such as Chemistry, initiated by the study of the Periodic Table .
Learning is always a continuous link formed by large amounts of dedication and some of talent. This effort passed from generation to generation has made the construction of the contemporary world possible.
The periodic table is a graphic system widely used in the study of natural sciences at all levels of knowledge, printed on blackboards for children’s classes and on academic banners .
It consists of the representation of chemical elements arranged by the atomic numbering criteria such as electron disposition and periodic properties, namely:
- Atomic radius;
- Ionization energy;
- Electronic affinity;
Getting to this diagram, which organizes 118 chemical elements according to their atomic properties, was not easy. The path to its current version can be traced back to 1829 with the Dobereiner Table.
The Periodic Table as it is known today is the result of exhaustive studies of chemical interactions and bonds of atoms, from which comes the interdisciplinarity with Physics. Going back 191 years in time, the 118 known elements can be reduced to 30.
Chemist Johan Wolfgang Dobereiner has systematized these 30 elements into triads formed on the basis of structural similarities between them.
The construction of a study routine was the pillar that moved scientific expeditions for centuries. The Dobereiner model was discarded in the period because it considered these similarities to be an effect of coincidence.
Music and screws
The next promising candidate for the title of periodic table would only come 33 years after the discard of the Dobereiner Table.
The new attempt consisted of organizing the elements in ascending order of atomic mass, in a spiral in the shape of a cylinder. Using this geometric form of cataloging has proven efficient to approximate similar elements in columns.
The model was called the Chancourtois Telluric Screw, an allusion to the name of the scientist responsible for the creation together with the method of organization used.
The columns of elements of this model were later framed in the Law of Octaves of Newlands, a chemist and musician, who united the two areas in transforming the musical scale into the atomic scale.
As it did not contain the amount of new elements that emerged, both systematization strategies proved to be insufficient.
deciphering the table
The idea of memorizing 118 chemical elements for a test or seminar while the student is still learning how chemical reactions and atomic bonds work is seen by many as a mission impossible.
In view of exactly the difficulty of assimilating this content, those responsible for the schematization of the Periodic Table attributed a logic in the structure that explains why each element is located in a certain place.
The Periodic Table is to Chemistry what a map is to Geography. In the same way that coordinates and concepts like latitude and longitude are learned to understand it, there are simple concepts that help to unravel this system.
As you draw a sketch of a modern table in a custom notebook , notice the existence of the 18 element families in vertical order and the increase in atomic numbering in horizontal order, from 1 to 1.
The first step in interpreting the Periodic Table is to master the concepts of protons and electrons. Atomic properties numbered in horizontal order represent the number of protons in each element.
There are ways to help associate element abbreviations to their positions in tables. Fitting them into words is a simple and fun way to remember, such as: Today Camila Noticed The Duck Dirting the Sap.
This being a code including all the elements of the family of non-diatomic metals. It is possible to learn the already constructed sentences or write down your own sentences in a custom a4 notebook to memorize.
The table is also divided into color-marked element types. The first family, which represents the first vertical column, is formed by the alkali metals, with the exception of hydrogen, a non-diatomic metal.
Alkaline earth metals form the second family in the table. Families 3 to 12 are transition metals, followed by post-transition metals, semi-metals, polyatomic and diatomic non-metals, up to noble gases.
One way to understand the arrangement of the Periodic Table is through the study of Moseley’s Periodic Law, presented to the academy in 1913. The Law establishes a relationship between periodic function and chemical properties of the elements.
There are many ways to assimilate extensive content, and creativity is very welcome in these situations.
However, understanding the whys and origins of what is studied is the only way to achieve a deep learning, possible with an intelligent study routine.
This text was originally developed by the team at the Guia de Investimento blog , where you can find hundreds of informative content on various segments.