



Helium gas
diRegina Ciccone•~1min di lettura
Generi e atmosfera
Helium is a chemical element with the symbol He and it has an atomic mass of 4 u, with atomic number 2. At room temperature, helium is in the gaseous state.
Sinossi
Helium is a chemical element with the symbol He and it has an atomic mass of 4 u, with atomic number 2. At room temperature, helium is in the gaseous state.
LStoria completata~1min di lettura
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