A couple of notes: You've got your choice of white background or black background. The periodic table is optimized for 1920x1080 high definition. If your resolution is different the image will scale just fine, but the data might not be as crisp. If you want a background color other than black or white, shoot me an email and I'll fix you up.
Periodic Table Wallpaper - Black Background
Periodic Table Wallpaper - White Background
Periodic Table for Cell PhonesThese files are in jpg format, which makes them suitable for most cell phones and other mobile devices.
Periodic Table Wallpaper - Black Background (jpg)
Periodic Table - White Background (jpg)