The Weighted Average Mass Of An Element Is Atomic Mass The Periodic Table

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The Periodic Table

The periodic table has all the elements that have ever existed. They are listed in order of the number of protons each atom has in its nucleus. Elements are arranged in order of increasing atomic number. These elements can be divided into two groups, metals and non-metals. Metals are solids except for mercury Hg, which is a liquid. They also conduct electricity and heat very well. Nonmetals, on the other hand, react negatively to electricity and heat, but gain electrons in chemical reactions. Some nonmetals are liquids.

The periodic table was first drawn in 1869 by the Russian chemist Dimitri Mendeleev. He was deeply interested in chemistry and wanted to settle the subject. So he created the periodic table but left room for other elements that he predicted would come. Before he could create the periodic table, he wrote 65 known elements on cards – each element on a card. He then listed the basic properties (inertia, mass, weight, volume, density, and specific gravity) followed by atomic weight. He noticed that the elements would repeat themselves, but the atomic number kept increasing. It was only later that he awoke from his sleep that his mind had resolved the pattern into logically organized elements.

As you move from left to right (known as groups) the element’s atomic number on the periodic table will increase, and if you read the elements horizontally down and up (known as periods) you will the first term has one orbital for electrons. All elements in the second period have 2 orbitals. So as you go through the period the element gets more orbitals and the maximum is 7. Group elements have the same number of electrons in their outer orbitals. Also called valence electrons, these electrons are included in chemical bonds and many other elements.

From 1869 when the first periodic table was made until now, there have been – there have been significant changes in the table. We started with 65 items and ended up with 118 items. It was very helpful for everyone, now that the items are sorted it helps others to understand better and teach more people quickly and properly. Dimitri was a genius who had a great impact on the history of chemistry, he could put together puzzles and know about future elements. The periodic table is a combination of the elements of the old world and our modern elements that help us identify new reactions and chemical reactions.

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