Soddy is a famous British chemist. 1877 was born in Eastburn, and 1956 died in Brighton on September 22nd. 1898 graduated from Oxford University. From 1900 to 1903, he co-founded the radioactive decay theory with E. Rutherford at McGill University in Montreal, Canada, and revised Dalton's atomism. 1903 ~ 1904, in cooperation with W. Ramsey of London University, proved that radium can produce helium. From 1904 to 19 14, he taught at Glasgow University, from1914 to19, he was a professor at Aberdeen University, and from19.