So how has the periodic table been put together? Mrs Roberts: Well, the modern periodic table shows us all of the elements arranged in rows, which are called periods. It has changed a lot over the ...

With Glenn T. Seaborg's 1945 discovery that the actinides were in fact f-block rather than d-block elements, a recognisably modern form of the table was reached. The periodic table and law are now a ...

Can France claim the first periodic table? Probably not, but a French Geology Professor made a significant advance towards it, even though at the time few people were aware of it. Alexandre Béguyer de ...

Thus, in the modern periodic table, the elements are arranged according to their atomic number - not their relative atomic mass. "We now know the 'how it works, why it works', and this is to do ...

Is the periodic table hanging in your lab, classroom, or office woefully out of date ... Lavoisier’s work in framing the principles of modern chemistry led future generations to regard him as a ...

The ACS is making educational resources available by topic to aid parents and teachers during this time of distance learning. The Periodic Table is an amazing chemistry tool that is organized with ...