When is National Periodic Table Day?
Tuesday February 7thNational Periodic Table Day is commemorated on February 7th, as the first table of elements is published. We also take a look at how the periodic table has shifted through the years.
The periodic table has existed for a long time. In many ways, it and the discovery of elements have influenced science. The ancient man was only aware of a few basic elements. However, by the 1st century A.D., mankind knew about the elements of gold, silver, copper, iron, lead, tin, mercury, sulfur, and carbon. We added arsenic, antimony, phosphorus, and zinc to our discoveries over time. There were 47 identified elements by 1809, and 47 more were discovered by 1809. It was time to organize, and Johann Döbereiner was one of the first attempts to do so. He divided the elements in 1817 into triads, or triads, based on similar characteristics.
John newlands
One of the first table of elements was published on February 7, 1863, by English chemist John Newlands. Based on the "Law of Octaves," Newlands divided the known 56 elements into 11 groups. Anyone element of the table will have similar characteristics to elements eight places before and behind it.
Newlands was one of the first scientists to observe a pattern in element properties, ranging the elements according to increasing atomic weight. As a result, his table was always open for new discoveries. Future discoveries would even complete the table, according to the journal. In fact, Newlands correctly predicted the discovery of Germanium.
