1. Federal Artillery button 1821-circa 1840
2. Modern civilian blazer button
3.Great seal with cutout device and rim. Cuff or cap button. There is a thread on this site dating the numerous backmarks.
4. I can't see it well enough to venture a guess. Another cuff size. Is there lettering around the front edge?
5. I thought it might be Navy but the lack of detail and tin back makes me question that. Maybe another civilian one? Yet another cuff size one.
Maybe someone else with more knowledge will chime in.
This is also the Great Seal. It's like it was popped out but the center shield was pushed in. There's no lettering around the edge, but there are stars around the edge. Because of its shape and its shininess, I'm having a heck of a time getting good pics of it.