How Are Elements Arranged on The Periodic Table?

How are elements arranged on the periodic table?: The periodic table’s layout was designed to provide a very accurate portrayal of the chemical elements. The periodic table specifically places each of these elements there while taking into consideration a number of factors.

Since its creation, the periodic table’s layout has undergone changes. This is due to the periodic table having been updated as a result of new elements being either discovered or created by humans.

Let’s first go back in time before delving into the minutiae of the periodic table.


Father of the Periodic Table: Dmitri Mendeleev


According to the Royal Society of Chemistry, Dmitri Mendeleev, a Russian chemist and inventor, is regarded as the “father” of the periodic table. Mendeleev was a well-liked instructor at St. Petersburg University in Russia in the 1860s.

There were no official modern organic textbooks available at the time that could be used as a primary source of information. Mendeleev made the decision to write one in order to address two main problems: the first was how to organise the many characteristics of the elements, and the second was how to resolve the issue of an authoritative book.

Dmitri Mendeleev (Public Domain/Wikimedia Commons Photo Credit)

However, in Mendeleev’s day, there were many challenges to overcome, so it wasn’t as easy as one may think. Less than half of the existing elements were known at the time, and some of those that were had inaccurate data. We could try to comprehend Mendeleev’s struggles by comparing them to a challenging jigsaw puzzle with half the pieces bent out of shape.

Mendeleev eventually achieved his goal and produced “Principles of Chemistry,” which was split into two volumes, which is considered to be the most important chemistry book of all time. He ended up providing the most important contribution to organic chemistry in history while working on the periodic table.

According to the Royal Society of Chemistry, he achieved this by listing each element’s characteristics on a card in ascending sequence of atomic weight. He did this because he had recognised a certain pattern in the elements.

He claimed that, after battling through the pattern for three days, he saw all the pieces come together in a dream. He awoke right away, noted it on paper, and then went back to sleep. When he awoke, he discovered that it just required one change! The elements were arranged by Mendeleev according to both their atomic weights and valence.

Additionally, he was astute enough to provide room for aspects that he anticipated would be discovered—and he was correct! On the basis of the rules he had established for the periodic table, he additionally anticipated, even prior to their discovery, the characteristics of five undiscovered elements and what their compounds would be.

Using the Periodic Table to read


The periodic table can now be interpreted in a variety of ways, offering a wealth of knowledge on a certain element or group of elements.

Atomic Number


The atomic number of an element is the first and most important thing that can be deduced from the periodic table. The atomic number of an element is the number of protons that make up an atom. Additionally, it provides a precise indicator of the element’s chemical activity. As an illustration, we can state that oxygen atoms have eight protons, hydrogen atoms have one, and carbon atoms have six.

Atomic Sign


The Atomic Symbol is the next important component. As banal as it may sound, every element is abbreviated by the atomic symbol. These universally recognised symbols enable us to condense the length of the element names. The shorthand is helpful since it makes it easier for us to recall the components and construct chemical equations more quickly.

Atomic Mass


Atomic Weight is the third important consideration. The atomic mass or atomic mass unit of an element is another name for its standard atomic weight.

The atomic number of each individual atom is always an integer, yet the periodic table oddly gives the atomic mass as a decimal number. This is due to the fact that the periodic table’s atomic mass units indicate the average atomic mass of all isotopes.

You may calculate an element’s neutron count by deducting its atomic number from its atomic mass (for naturally occurring elements).


Groups and Periods


The periodic table is a graphic representation that provides details about both distinct elements and elements with related qualities. The Periods are the seven rows of the periodic table. There are exactly the same number of electron shells encircling the atomic nucleus in each element in a given row.

Hydrogen and helium have one orbital shell each, while elements in the second row of orbitals have two, and so forth. The 18 columns, often referred to as groups, allow us to draw the following conclusion.

The number of electrons orbiting the nucleus in the outermost shell is the same for all the elements in a group. Hydrogen, helium, and the “transitional elements,” which are found in groups 3 through 12, are exceptions to this norm.

A set of elements has significant chemical similarities. For instance, group 18 contains the noble or inert gases. Five halogens make up group 17.

Graphic indicators for the periodic table


Additionally, some periodic tables feature graphic indicators, which are simply coloured periodic tables. The condition of the element at absolute zero is represented by these colours. The type of element an element is can be inferred from the border.

If the border is solid, the element is naturally occurring; if the border is dotted, the element is radioactive; and if the border has dashes, the element is artificially created.

The periodic element may have a single thick line running down the middle, with non-metallic elements on the right and metallic elements on the left.

Lanthanides and Actinides on the periodic table


Two more rows of elements, totaling fourteen, are located at the bottom of the periodic table. Lanthanides, often known as rare earth elements, are the elements in the top row. Actinides are the elements in the bottom row.

They start with element 90 and go all the way to element 103. There are, however, elements that go beyond 103, and there is a persistent drive for higher order elements.

In conclusion, we can conclude that what began as a single man’s labour has now produced stunning, illustrated, and thoroughly explicatory road maps for every known element—as well as a pattern of prediction towards those elements that are yet beyond our comprehension!