Helium. Element 2 of the periodic table of chemical elements.
Schlüsselwörter
helium,
he,
decay,
fusion,
cooling,
gas,
sun,
atmosphere,
aerostatics,
balloon,
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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