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/ˈhiː.li.əm/ · noun
(uncountable) The second-lightest chemical element (symbol He), with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas..
It was an enormous balloon filled with helium, that elemental gas forged from hydrogen in the nuclear furnace of the stars.
Use helium when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Helium means (uncountable) The second-lightest chemical element (symbol He), with an atomic number of 2 and atomic weight of 4.002602, a colorless, odorless and inert noble gas..
Common synonyms include E939 when used as a packaging gas, he, atomic number 2.
The opposite depends on the specific sense.
It was an enormous balloon filled with helium, that elemental gas forged from hydrogen in the nuclear furnace of the stars.
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