Periodic Table of Elements Timeline By 34192 Jan 1, 1766 Hydrogen Jan 1, 1772 NItrogen Jan 1, 1774 Oxygen Jan 1, 1797 Berylium Jan 1, 1808 Boron Jan 1, 1817 Lithuim Jan 1, 1886 Fluorine Aug 1, 1895 Helium Jan 1, 1898 Neon Jan 1, 3750 Carbon BC
