The periodic table has all the elements that ever existed. It has been grouped in the order of the number of protons that each individual has in their atomic nucleus. The elements are organized by increasing atomic numbers. Those elements can be separated into two groups, metals and non-metals. Metals are solid with the exception of mercury Hg, it is a liquid. They also do well with electricity and heat. Nonmetals, on the other hand, malfunction with electricity and heat, but obtain electrons in chemical reactions. Some non-metals are liquid.
The periodic table was first made in 1869 by a Russian chemist Dimitri Mendeleev. He had a deep passion for chemistry and wanted to organize the subject. So he created the periodic table but left space for other elements that he predicted for the future. Before he could create the periodic table, he wrote 65 known elements on index cards, each element on a separate card. Then he wrote the fundamental properties (inertia, mass, weight, volume, density, and specific gravity) followed by atomic weight. He noticed that the elements were repeating but the atomic number kept increasing. It wasn’t until later, when he woke up from a nap, that his mind had already worked out the pattern of logically organized items.
As you move from left to right (known as groups), the element’s atomic number will increase on the periodic table, and if you read the elements horizontally up and down (known as periods), the first period has an orbital for its electron. All elements of the second period have 2 orbitals. So as you go through the periods, the elements gain more orbitals, with 7 being the maximum. The elements of the groups have the same number of electrons in the outer orbital. Also known as valence electrons, it is the electrons that are incorporated with chemical bonds and many other elements.
Since 1869, when our first periodic table was made, to this day, we have had great changes in the table. We start with 65 elements and end with 118 elements. It has helped everyone dramatically, now that the elements are organized, it helps others better understand and teach many people more quickly and appropriately. Dimitri is a genius who has had a great impact on our history of chemistry, he was able to put together a puzzle and even discover future elements. The periodic table is a mixture of our old world elements and modern world elements that has helped us discover new chemical reactions and reactions.