The periodic table of elements (often known simply as the periodic table) has been helping scientists with their work for a little over 150 years. The handy visual reference guide organizes known ...

First 20 Elements Of The Periodic Table: The atomic number and symbols are important in chemistry. The atomic number of elements gives us an idea about the atomic structure of elements ...

Many scientists worked on the problem of organizing the elements, but Dmitri Mendeleev published his first version of the periodic table in 1869, and is most often credited as its inventor. Since then ...

When Mendeleev first published the original periodic table in 1869, it contained only 63 elements — about half as many as there are today. His table had gaps to leave room for elements that had ...

To expand the periodic ... of the periodic table. In a proof-of-principle experiment, scientists created the known element livermorium, element 116, using titanium for the first time.

At the far end of the periodic table is a realm ... after the fallout from the first nuclear bomb explosions began turning up in the form of new radioactive elements such as fermium (atomic ...

See if you can organize the first 25 elements of the periodic table in order in the quiz below. The periodic table as we know it is widely credited to Dmitri Mendeleev, a Russian chemist who kept ...