Radon. Element 86 of the periodic table of chemical elements.
Schlüsselwörter
radon,
radioactive,
regulation,
deadly,
poisonous,
building,
element,
periodic table,
molecular,
atom,
symbol,
oxidation,
material,
chemistry,
structure,
industry,
matter,
process,
physics,
property,
discovery,
poster,
cube,
metallic,
laser,
relief,
laboratory,
experimentation
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