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Helium

De Wikipedia
Pro su bass densita e incombustibilita, helium es li gas preferet de plenar aeronaves

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.

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