How is it possible that gases (helium especially) can leave a balloon or even a high-pressure tank over time ?
In: Chemistry
Hydrogen and helium are very very smol atoms (the smallest they can be and still be called atoms, in fact). So they kinda just… slip through the gaps between larger atoms that form the container. They have an easier time doing that through something very thin, like a stretched balloon, but slowly they can find their way out of solid metal tanks.
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