Helium. Element 2 of the periodic table of chemical elements.
Palabras clave
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