I have made a giant periodic table from files created in Publisher. Each element is represented by an (almost) A4 sheet. I was lucky and had a large wall that needed covering so that's why I made it. However, I just talked with one of my colleagues and have now found out that there is some debate as to what Po and At are. I considered Po to be a metal but it's sometimes classified as a metalloid, and I thought that At was a metalloid but apparently that is sometimes classified as a non-metal. I just wondered if ther was a standard anywhere to base my table on. I tried the RSC and IUPAC websites but couldn't find anything on either site. It probably isn't that important as the boundaries are blurred but for the sake of completion I'd like a satisfactory and up to date answer. By the way, when I find out, I'll put the files up for grabs to anyone that wants them. It makes a rather impressive 2m by 4m periodic table. I use it all the time in my teaching and to play games like Splatt! on it.