Periodic Table of Chemical Elements

In the American Chemistry Association (ACS), our vision is to improve the lives of people through chemistry transformation. Next year is Mendeleev 150th anniversary of the announcement of the chemical period table. To celebrate this important moment, the United Nations Educational, Scientific and Cultural Organization (UNESCO) officially announced 2019 as "UN International Element Table" or "IYPT 2019".

ACS and chemical groups around the world are celebrated throughout the year. The celebration of IYPT includes meetings, technical shows, theme gifts and prizes, citizen participation activities, and so on.

The mission of ACS is to promote a wider chemical company and its practitioners for the benefit of the Earth and its people. We participated and showed that chemical elements celebrate the origin and development of the Periodic Table of the Elements over the past 150 years, linking the cultural, economic and political aspects of the global society in a common language please. Learn more

Everything in this world consists of elements like oxygen, iron, gold, and all other elements of the periodic table. A chemical is an element or any combination of these elements. For example, oxygen in the air is a chemical substance, it is always a combination of two oxygen elements. Elements are the cornerstone of other chemicals, making single elements the simplest element among chemical substances. First, the body is entirely composed of chemicals - from the air we suck in to the muscles (chemicals including nitrogen, hydrogen, oxygen) to move the arm. But not only all the chemicals in our body but also our chemicals react with other chemicals in our body in order for our bodies to function.

The Periodic Table of Elements is an array of chemical elements, organized according to their atomic number, electronic configuration and repeated chemical properties. Elements are listed in ascending numerical order. The standard format of a table consists of a grid of elements whose rows are called periods and whose columns are called groups. The history of the periodic table reflects the growth of understanding of chemical properties over a century. The most important event in its history occurred in 1869 when Dmitri Mendeleev published a form based on early discovery by scientists such as Antoine-Laurent de Lavoisier and John Newlands, but their development Generally agree with the agreement.

The Periodic Table of Elements is abbreviated as the periodic table of elements, and is a tabular array of chemical elements arranged according to atomic number, electronic configuration and repeating chemical properties, its structure is a periodic trend . Normally, in one row (period), the element is not metal on the right side but metal on the left side and elements with similar chemical behavior are arranged in the same column. Table rows are often called periods and columns are called groups. Six groups accepted names and assigned numbers: for example, the elements of the 17th group are halogen; and the 18th group is inert gas. Four simple rectangular regions or blocks associated with filling different atomic orbitals are also shown.