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Which element has the lowest density?
Quick Answer
Hydrogen has the lowest density of any element, about 0.09 g/L as a gas at standard conditions.
The Full Story
Hydrogen is the lightest element and has the lowest density under normal conditions. As a gas at standard temperature and pressure, its density is about 0.0899 grams per liter, making it far lighter than air. This is why hydrogen rises rapidly in the atmosphere. Its low density also helped make it useful historically in balloons and airships, although safety issues limited its use.
Key Facts
1.Hydrogen gas density: about 0.0899 g/L at STP
2.Element symbol: H
3.Atomic number: 1
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Suggested video title for this topic:
"The lightest element of all, floating straight up"
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