Protactinium (new) - Periodic Table of Videos

it is one of the few elements that is more or less totally useless protactinium is an element which is actually much more interesting than I

expected the first interesting fact is that it is one of the elements whose existence was

predicted by Mendeleev you've probably all heard her Mendeleev predicted the existence of gallium and scandium because there were holes in his periodic

table and he also worked out that there was a hole between thorium and uranium where he felt there should be an element

now the reason that people don't make such a fuss about protactinium in the context of mandalay of is the protein ian was only really tied down discovered

properly in 1918 well after the death of Mandalay where is he was here to celebrate gallium and

scandium and that made him famous the problem with protactinium is that it exists in a very very small quantities

in nature and it is called protactinium originally it was called proto actinium because it decays by radioactivity to form actinium originally because

Mendeleev didn't know about the these series the lanthanides and actinides he put protactinium here

so you would have after actinium you would have thorium protecting him and then uranium and so he thought that the chemistry of protactinium would be