Why can't helium be removed from the atmosphere via chemical sinks?
Answer
It is a noble gas with a full outer electron shell, making it chemically inert.
As a noble gas, helium is exceptionally unwilling to form chemical bonds, preventing it from reacting with other elements or becoming part of a heavier molecule that could be removed via chemical or physical sinks.
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How Can Gases Such as Helium Escape the Earth's Atmosphere?
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