1. Periodic Table Web Elements Web Elements

2. Hydrogen Hydrogen was discovered by Henry Cavendish at 1766 in London, England. Origin of name: from the Greek words "hydro" and "genes" meaning "water" and "generator". Atomic number: 1 Standard state: gas at 298 K

3. Calcium Calcium was discovered by Sir Humphrey Davy at 1808 in England. Origin of name: from the Latin word "calx" meaning "lime". Atomic number: 20 Group in periodic table: 2

4. Lithium Lithium was discovered by Johan August Arfvedson at 1817 in Stockholm, Sweden. Origin of name: from the Greek word "lithos" meaning "stone", apparently because it was discovered from a mineral source whereas the other two common Group 1 elements, sodium and potassium, were discovered from plant sources. Atomic number: 3 Classification: Metallic

5. Sulfur Sulfur was discovered by Known since ancient times at no data in not known. Origin of name: from the Sanskrit word "sulvere" meaning "sulphur"; also from the Latin word "sulphurium" meaning "sulphur". Atomic number: 16 Group name: Chalcogen

6. Boron Boron was discovered by Sir Humphrey Davy, Joseph-Louis Gay-Lussac, L.J. Th& � nard at 1808 in England, France. Origin of name: from the Arabic word "buraq" and the Persian word "burah". Classification: Semi-metallic Atomic number: 5

7. Osmium Osmium was discovered by Smithson Tennant at 1803 in England. Origin of name: from the Greek word "osme" meaning "smell". Group name: Precious metal or Platinum group metal CAS Registry ID: 7440-04-2

8. Zirconium Zirconium was discovered by Martin Heinrich Klaproth at 1789 in Berlin, Germany. Origin of name: from the Arabic word "zargun" meaning "gold colour. Atomic weight: 91.224 (2) Atomic number: 40

9. Chromium Chromium was discovered by Louis-Nicholas Vauquelin at 1797 in France. Origin of name: from the Greek word "chroma" meaning "colour", named for the many coloured compounds known for chromium. Classification: Metallic Atomic weight: 51.9961

10. Germanium Classification: Semi-metallic Germanium was discovered by Clemens Winkler at 1886 in Germany. Origin of name: from the Latin word "Germania" meaning "Germany". Group in periodic table: 14

11. Silver Silver was discovered by Known since ancient times at no data in not known. Origin of name: from the Anglo-Saxon word "siolfur" meaning "silver" (the origin of the symbol Ag comes from the Latin word "argentum" meaning "silver"). Atomic number: 47 Group name: Coinage metal Classification: Metallic

12. Krypton Krypton was discovered by Sir William Ramsay, Morris W. Travers at 1898 in Great Britain. Origin of name: from the Greek word "kryptos" meaning "hidden". Standard state: gas at 298 K Atomic number: 36

13. Magnesium Magnesium was discovered by Sir Humphrey Davy at 1755 in England. Origin of name: from the Greek word "Magnesia", a district of Thessaly. Symbol: Mg Atomic number: 12 Colour: silvery white

14. Uranium Uranium was discovered by Martin Klaproth at 1789 in Germany. Origin of name: named after "the planet Uranus". Atomic weight: 238.02891 Atomic number: 92

15. Livermorium Livermorium was discovered by Yu.Ts. Oganessian, V.K. Utyonkov, Yu.V. Lobanov, F.Sh. Abdullin, A.N. Polyakov, I.V. Shirokovsky, Yu.S. Tsyganov, G.G. Gulbekian, S.L. Bogomolov, B.N. Gikal, A.N. Mezentsev, S. Iliev, V.G. Subbotin, A.M. Sukhov, O.V. Ivanov, G.V. Buklanov, K.Subotic, M.G. Itkis, K.J. Moody, J.F. Wild, N.J. Stoyer, M.A. Stoyer, R.W. Lougheed, C.A. Laue, Ye.A. Karelin, and A.N. Tatarinov at 2000 in Dubna, Russia. Origin of name: temporary systematic IUPAC nomenclature. Atomic number: 116 Atomic weight: [ 293

16. Gold Gold was discovered by Known since ancient times. at no data in not known. Origin of name: from the Anglo-Saxon word "gold" (the origin of the symbol Au is the Latin word "aurum" meaning "gold"). Atomic number: 79 Period in periodic table: 6