The periodic table of the chemical elements is a tabular method of displaying the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869. Mendeleev intended the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior.
The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize and compare all of the many different forms of chemical behavior. The table has found wide application in chemistry, physics, biology, and engineering, especially chemical engineering. The current standard table contains 117 elements as of March 10, 2009 (elements 1-116 and element 118).
IF you want to see a picture of the table click on this.
http://www.accessscience.com/images/periodic_table.gifI know what the periodic table looks like, but where did it come from? Whose idea was it to arrange the elements this way?
In 1869, a Russian chemist named Dmitri Mendeleev came up with a way of organizing the elements that were known at the time.
He set them out in order of atomic weight, and then grouped them into rows and columns based on their chemical and physical properties. but in 1869 they did not know what atoms were at all or did they know . The periodic table of the chemical elements is a tabular method of displaying the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869. Mendeleev intended the table to illustrate recurring ("periodic") trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered, and new theoretical models have been developed to explain chemical behavior.The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize and compare all of the many different forms of chemical behavior. The table has found wide application in chemistry, physics, biology, and engineering, especially chemical engineering. The current standard table contains 117 elements as of March 10, 2009 (elements 1-116 and element 118). I'm right. Mendeleev had no idea what atoms were made of or why they behaved as they did. Never the less, he was able to put together the periodic table almost as we know it today except that some elements were missing, because they were unknown in 1869.