Ripeng 14 Pcs Metal Element Cubes Density Cube Set Element Periodic Table Pure Tungsten Cube, Titanium, Bismuth, Aluminum, Iron, Copper, etc for Element Collections Gift Hobbies Lab Material (10 mm)

Great little cubes of the stuff of our world is made of. Just fun, marvelous, and thought provoking....

These little cubes are an amazing learning prop to teach the relation between volume, density, mass and weight. Love it!

Excellent way to keep the elements clean.

There are 13 cubes of almost pure metals plus a cube of Carbon, about 1 cm in each of the dimensions. Although highly educated, I have never seen nor held most of these. Surprised by the color, feel and weight of several of these. Fascinating and a great gift to anyone with curious mind. Well worth it. Includes Mo, Sb, W, Bi, and V, all metals! Niobium is also included, have you heard of it before?Cubes come in vacuum package in a disorderly layout so many symbols cannot be seen, thus you must open it. That is when exposure to air oxygen begins and will eventually tarnish many a cube. Try re-vacuuming if you can.

Very nice.

Excellent

I just received these. I already had a cube of tungsten and of titanium from somewhere else. I like that these came packages in a plastic box. My complaint with them is the inconsistency of the cubes. Some include the element name on front. There are some with the atomic weight on the front and others with it on back. A few have density on front and others on the back, or not at all. I would expect to have them consistent especially if they were to be used for teaching.

The printing is not very good and some cubes have a vague misprint on them. On the plus sude, the cubes are cut nice and sharp, the xorners and edges are sharp, and the sides are flat.