The United Nations General Assembly (UNGA) in its 74th Plenary Meeting declared 2019 as the International Year of the Periodic Table of Chemical Elements (IYPT2019) on 20 December 2017.
The International Year of the Period Table of Chemical Elements was kept to commemorate the 150th birthday of the periodic table of chemical elements.
The Periodic table of the Chemical elements was first published by Russian scientist Dmitry Mendeleev in the year 1869.
The International Year of the Period Table of Chemical Elements is an opportunity to reflect upon many aspects of the periodic table, including its history, the role of women in research, global trends and perspectives on science for sustainable development, and the social and economic impacts of this field
To celebrate the International Year of the Period Table of Chemical Elements the UNESCO would be organizing events like an online competition to test high school students’ knowledge of the table, and scientific experiments brought to schools around the world.
The Periodic Table of Chemical Elements is the tabular arrangement of the chemical elements, arranged by atomic number, electron configuration, and recurring chemical properties. The important features of the periodic table are:
The seven rows of the table are called as periods and generally accommodate metals on the left and non-metals on the right.
The columns of the table are called groups and contain elements with similar chemical behaviors.