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Flawless Preservation: Each element is permanently cast in high-optical-grade lucite acrylic
The arsenic in these cubes is pure arsenic encapsulated in a glass ampule to prevent oxidation
Zirconium's atomic number is 40 and its symbol is Zr
New Mexico under the code name "Trinity"
With tusks up to 15 feet long and a body mass of 6 tons
Thorium Element Cube Historical Artifacts Flawless Preservation: Each element isThorium's atomic number is 90 and its symbol is Th. Thorium is silvery and tarnishes black when it is exposed to air, forming thorium dioxide; it is moderately soft, malleable, and has a high melting point. All known thorium isotopes are unstable. The most stable isotope, 232Th, has a half life of 14. 05 billion years, or about the age of the universe Thorium was discovered in 1828 by the Norwegian amateur mineralogist Morten Thrane Esmark and
