Helium
Helium es li chimic element con atomic númere 2 e un atomic pesa de 4,002602, e it es representat per li simbol He.
It es un monatomic gas sin color, odore, o guste, e it es anc intoxic e inert. Helium is li prime in li gruppe del gases nobil in li tabelle periodic. Su punctus de bollition e fusion es li max bass de omni elementes, e it existe solmen quam un gas, except por conditiones extrem. Sequente hydrogen, it es li duesim max abundant element in li universe, e it provide 24% del masse elemental de nor galaxie.
Vide anc
- Gas nobil
- Tabelle periodic
Referenties
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