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 ...

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 ...

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 ...