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 ...

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 ...

This year we celebrate the 150 th anniversary of Mendeleev’s achievement in formulating the structure of the periodic ... The first recorded attempt at creating a system to organise the elements was ...

Di - 138 We - 140 — — — II (-) 10 ... of the above elements, there has been no doubt as to what place they ought to occupy in the Periodic Table. When scandium was first isolated ...

In this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, ...

For the last fifty or so years, the periodic table has been incomplete. Elements after uranium on the periodic table have been synthesized for the past few decades, but there were always a few ...

Electronegativity, an essential characteristic of all elements in the periodic table, measures an atom's ability to attract electrons towards itself within a chemical bond. This vital theoretical ...

Copper has been used by humans for as much as 7000 years and elements such as gold, silver, tin, lead and mercury have been known for many thousands of years. However, the first scientific ...

You interact with about two-thirds of the elements of the periodic table every day. Some, like carbon, oxygen, and nitrogen, make up our bodies and the air we breathe. Yet there is also a class of ...