THE ELEMENTS
In the past, glass manufacturers added uranium to glass for color. Uranium has since become more strictly regulated, but the old uranium glass objects are still floating around. Because of the uranium content, these marbles glow bright green under ultraviolet light. Size is around ⅞ – 1” diameter. Some dents and manufacturing imperfections can be expected. Slightly radioactive, but they're harmless. Makes... More info
Gallium is a metal with a very low melting point. In fact it will melt in your hand after a few minutes. Once it is liquified, it is an interestingly dense liquid, similar to mercury (except gallium is non-toxic!) This vial contains 15g of this interesting element. Non-toxic, but we wouldn't eat it. Like water, gallium expands when frozen, so... More info
Bismuth is one of the pure chemical elements (Bi, 83) and a metal with many unique properties. It is almost as dense as lead, but without the toxicity. It is also one of the least thermally conductive metals, but has a relatively low melting point (271°C, 520°F). In fact, when melted, bismuth can crystallize upon cooling into the stair-stepped pattern. The... More info
Set of 10 cubes of various materials to compare densities. Cubes are 1" (25.4 mm) Materials included: Copper (8.85 g/cc) Brass (8.4 g/cc) Steel (7.8 g/cc) Aluminum (2.7 g/cc) PVC (1.35 g/cc) Acrylic (1.2 g/cc) Nylon (0.9 g/cc) Rosewood (0.9-1.0 g/cc) Oak (0.6–0.95 g/cc) Pine (0.35–0.5 g/cc) More info
Over 200% funded on Kickstarter! If you compress any amount of mass, it becomes denser. If you compress it enough, it will become so dense that light can no longer escape it—this size is the object’s Schwarzschild radius. An object that is compressed smaller than this radius is a black hole. This tungsten sphere has been engineered to have exactly the... More info
Musket Ball: Muskets were smoothbore muzzle-loading weapons, firing round lead balls or buck and ball ammunition, that were also designed to accept a bayonet. This style of musket was retired in the 19th century when rifled muskets (simply called rifles in modern terminology) became common as a result of cartridges breech loading firearms introduced by Casimir Lefaucheux in 1835, the invention of the Minié ball by Claude-Étienne Minié in... More info
With this future-proof table, blank boxes are arranged as placeholders for the predicted locations of undiscovered elements. When a new element is confirmed, write in its name, symbol, weight, and other properties it might have in the appropriate box. Includes the following info about each known element: Atomic weight (of most stable isotope) Font weight is also indicative of atomic weight Phase... More info
Radium [Ra, 88] is a radioactive element, so it isn't something you come across everyday. But decades ago, it was painted on watch hands since it naturally glows in the dark. This practice was discontinued in the 1960s, and now these old watch hands make a great radium sample for your element collection.More info
1" neodymium magnet with a pull of 150lb. More info: A neodymium magnet (also known as NdFeB, NIB or Neo magnet) is the most widely used[1] type of rare-earth magnet. It is a permanent magnet made from an alloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonalcrystalline structure.[2] Developed independently in 1984 by General Motors and Sumitomo... More info
This black powder is carbon black, a form of pure carbon (C) and the reason many rubber objects are black. Tires, shoe soles, and practically all rubber products where tensile and abrasion wear properties are important, are reinforced with carbon black. It is also a common pigment for black ink. Carbon black is one of the oldest pigments and was... More info
Wafers are thin sliced semiconductors used to manufacture microelectronics and computer components. This sample is an 8" uncut silicon wafer with integrated circuits. Each wafer contains thousands of duplicate photo-lithographed circuits. Typically this wafer would have been cut up and the individual components would be installed in cell phones, satellite, computers, etc. This item is very fragile, so handle with care. ... More info
Zirconium is an element with valuable properties. Don’t dismiss this element as “cheap” due to the commercial popularity of cubic zirconia (ZrO2). Pure Zr is a metal and one of the most heat and corrosion resistant elements. Due to these properties, zirconium is used in nuclear reactors as the cladding that separates the fission fuel from the coolant. Zirconium metal usually contains... More info
