Why is helium used to fill balloons instead of hydrogen?
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Because helium is lighter than air, a helium balloon rises. Hydrogen is another gas lighter than air; it is even lighter than helium. Helium is a special gas called a Noble Gas, which means it doesn't burn.
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ʏᴏᴜʀ ᴀɴsᴡᴇʀ ɪs ᴛʜᴇ ᴀᴛᴛᴀᴄʜᴍᴇɴᴛ
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