A new periodic table is coming soon

In 2011, there will be a change in atomic mass of 10 chemical elements in the Periodic Classification of Chemical Elements.

For the first time in history, the atomic mass of some elements in the Periodic Classification of Standard Chemistry Elements in textbooks around the world will be changed.

The IUPAC International Union of Isotopes and Atomic Masses (IUPAC) is about to introduce new atomic mass, representing the range of values ​​of 10 element, instead of just having a standard value as before.

Table of periodic classification of chemical elements . (Internet photo)

The new atomic mass of these elements will be expressed by a range of values. For example, the atomic mass of the element Bo previously recorded in the Periodic Classification is 10,811, but the exact atomic mass of Bo is between 10,806 and 10,821, depending on where the substance is found. .

According to Dr. Vu Anh Tuan, Deputy Director of the Institute of Chemistry, Institute of Science and Technology of Vietnam, the change in atomic mass of 10 chemical elements will certainly cause disturbance because many chemical calculations will have to be calculated. again. In addition, the system of standard textbooks and textbooks will take time to update this change, especially when in Vietnam the current curriculum updates for universities, colleges . It takes more than 10 years to be executed once.

Modern analytical techniques can accurately measure the atomic mass of many elements, and their small fluctuations in atomic mass play an important role in research and industry.

For example, accurate measurement of the isotope amount of carbon is used to determine purity and food origin such as vanilla and honey.

The calculation of isotopes of nitrogen, chlorine and other elements is used to test contaminants in rivers and streams and groundwater.

Sport stimulants (doping) can be found because the atomic mass of carbon in male sex hormones (testosterone) in the body is higher than the amount of testosterone in stimulants.

This new classification of chemical elements is the result of IUPAC's research collaboration, the US Geological Survey and a number of other scientists.

The new periodic table will be officially introduced in 2011 - the year the United Nations has chosen as the international chemistry year under the initiative of IUPAC and UNESCO.