Madison Reynolds By Reynolds Aug 1, 1766 Hydrogen Henry Cavendish Aug 1, 1863 Iodine Bardnard Courtois Aug 1, 1894 Argon Sir William Ramsay Lord Rayleigh Aug 1, 1898 Krypton Sir William Ramasy Moris M. Travens Aug 1, 1994 Curium Glenn T. Seaborg Ralph A. James Albert Ghiorso
