Which is the first member of noble gas family?
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ʀᴀᴅᴏɴ ᴡᴀs ғɪʀsᴛ ɪᴅᴇɴᴛɪғɪᴇᴅ ɪɴ 1900 ʙʏ ɢᴇʀᴍᴀɴ ᴄʜᴇᴍɪsᴛ ғʀɪᴇᴅʀɪᴄʜ ᴇ. ᴅᴏʀɴ; ɪᴛ ᴡᴀs ᴇsᴛᴀʙʟɪsʜᴇᴅ ᴀs ᴀ ᴍᴇᴍʙᴇʀ ᴏғ ᴛʜᴇ ɴᴏʙʟᴇ-ɢᴀs ɢʀᴏᴜᴘ ɪɴ 1904. ʀᴀʏʟᴇɪɢʜ ᴀɴᴅ ʀᴀᴍsᴀʏ ᴡᴏɴ ɴᴏʙᴇʟ ᴘʀɪᴢᴇs ɪɴ 1904 ғᴏʀ ᴛʜᴇɪʀ ᴡᴏʀᴋ
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Radon was first identified in 1900 by German chemist Friedrich E. Dorn; it was established as a member of the noble-gas group in 1904. Rayleigh and Ramsay won Nobel Prizes in 1904 for their work.
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