A periodic table is a grid where you can see different elements located maintaining the same Electron distribution.
Said table is ordered according to this configuration, here you can find various data of each element that composes it, such as the electrical structure or the distribution of electrons according to the levels and the atomic number, the latter represents the number of protons and electrons that ‘he owns. element.
The Electron configuration of the periodic table
What is the Periodic Table?
Thanks to the periodic table, you can know the number of electrons of each level. When the Electron configuration of a certain element is known, it is possible to predict with great accuracy the group, atomic number and period in which the element is found in the periodic table.
All elements of the periodic table are classified according to their atomic number, the number of protons they have. The number of electrons will always be the same as the number of protons in neutral atoms, which allows us to know the number of electrons just by using the atomic number.
These elements are located inside the cells, where a symbol is assigned, but for this a column and a row must be defined, which are named as a group or period, in this way they follow the Electron distribution.
The line or point: represents the maximum coefficient of the sub-level, the columns or group represents the termination of the Electron distribution.
Origin of the Electron configuration of the periodic table.
- The periodic table shows the electrons in order following a series of properties and characteristics that repeat around it.
- These elements were for the first time classified according to their atomic number, which is represented by a capital letter Z, or according to their size, which is why the first element that begins the periodic table is hydrogen.
- Another point that contributed to the ordering of this periodic system is the external atomic configuration of certain elements, which behaved very similarly to each other and were grouped together in the same block.
When was the periodic table created?
The periodic table was created in 1864 by John Newlands, who, seeing the way the elements were arranged according to their atomic masses, noted that the eighth element had similar properties, a point which caused him to formulate the law of octaves, but that didn’t cover all the elements.
Then, in 1869, a much broader tabulation of the elements led by Dimitri Mendeleev was presented, which was based on the regular, periodic recurrence of properties.
Thanks to this tabulation, the properties of various elements which were not yet known could be predicted, as is the case of an element which he called eka-aluminum which was inferior to aluminum, and which for years later it was confirmed that said properties were predicted by Dimitri corresponds to gallium.
the periodic table today.
The periodic table is currently organized into periods and groups, periods are seven horizontal rows that show the last energy level of an element; and the groups correspond to 18 vertical columns which show the number of electrons in the last shell.
An element’s location in the periodic table, such as its period number (row) and group (column), provides important information about the location of its electrons. On the other hand, the number of the column or of the group in which an element is found provides information on its number of valence electrons and their respective reactivity.