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tennis rackets
Flawless Preservation: Each element is permanently cast in high-optical-grade lucite acrylic
New Mexico under the code name "Trinity"
With tusks up to 15 feet long and a body mass of 6 tons
3% is U-238
Thorium Element Cube Historical Artifacts tennis racketsThorium'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
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