Actinides and Lanthanides are elements in group 3A. true or false
I say false
2 answers
false, they belong in group 3B
Actually, with so many difference schemes out there to group the elements, the A and B system doesn't work very well as far as communications are concerned. One system in use that uses A and B to place the elements is the exact reverse of another system that uses A and B.
2 answers