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 ...

They all have a link to the periodic table, which turned 150 in 2019 ... Antimony has probably the most chequered past of all the elements on this list. Its first known use was quite glamorous ...

On the periodic table, metals are found on the left and in the middle, and non-metals are on the right. A zig-zag line divides them. In most periodic tables hydrogen (H) is shown separately but is ...