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and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye
Free shipping within the USA
6 parts per billion in the universe and is
The kit comes with:
without rescue
Radium Element Cube Experiments and has the second-highest atomicRadium is a chemical element with the symbol Ra and atomic number 88. This sample is an antique radium clock hand. The radium no longer glows but is still slightly radioactive. This sample is safe. The amount of radiation emitted from this cube is less than what you would receive on an airline flight. It is also legal to ship internationally due to the fact that it is an antique. Radium is the sixth element in group 2 of the periodic table, also known
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