Cl Chlorine
Contributed by collector no. 12
Chlorine gas in an ampoule. Difficult to see, but a faint yellow color is there.
Pb Lead
(Rephrased from contributor, and measurements are approximate.) On the left side: A small, 99% pure, mostly oxidized, coffin-shaped, 50 gram ingot of Lead. On the right side: 0.3cm diameter, 99.9% pure, completely oxidized lead shot.