290-Piece Organic Chemistry Molecular Model Teacher Set Subcategory_Entomology Supplies for side-by-side period-versus-mass comparisons across

for side-by-side period-versus-mass comparisons across three materials

5-inch needle-pointed stand grips a 3/4-inch-wide bar magnet upright for hands-free study of attraction

providing the standard mid-range value for current-limiting LEDs and dropping resistors in student circuits

Metal 82mm-diameter disc on a 6mm mounting rod

290-Piece Organic Chemistry Molecular Model Teacher Set Subcategory_Entomology Supplies for side-by-side period-versus-mass comparisons acrossTwo hundred ninety piece organic chemistry teacher set with 122 atoms and 168 links covering single, double, and triple bonds, with a removal tool and detailed photo illustrated manual.