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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"
from Greek
tennis rackets
Thorium Element Cube Historical Artifacts The arsenic in these cubesThorium'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
