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The styrofoam balls - posted from ,
Try not to put the nail through the seam, it splits them apart. But they may break anyway, cause they are too small.
Problem with balls from kit - posted from Kennewick, WA
The balls in the kit for the protons and neutrons are far too small for an eight inch diameter circle.
Online Periodic Table - posted from Durham, NC
Online Periodic Table - posted from Durham, NC
