Why is hydrogen used for filling balloons?
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hydrogen is not used to fill ballons . Helium is used to fill ballons because helium is ligther hydrogen. mark me as brainlist
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ʏᴏᴜʀ ᴀɴsᴡᴇʀ ɪs ᴛʜᴇ ᴀᴛᴛᴀᴄʜᴍᴇɴᴛ
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