Technetium was discovered and first isolated by Emilio Segrè and Carlo Perrier in 1937. Technetium is a chemical element with symbol Tc and atomic number 43. It...
Rhodium was discovered and first isolated by William Hyde Wollaston in 1804. Rhodium is a chemical element with symbol Rh and atomic number 45. It is a...
Ruthenium was discovered and first isolated by Karl Ernst Claus in 1844. Ruthenium is a chemical element with symbol Ru and atomic number 44. Below are the...
Niobium was discovered by Charles Hatchett in 1801. Niobium is a chemical element with symbol Nb and atomic number 41. Niobium is a soft, grey and ductile...
Zirconium was discovered by Martin Heinrich Klaproth in 1789. Zirconium is a chemical element with symbol Zr and atomic number 40. It is a lustrous, grey-white...
Yttrium was discovered by Johan Gadolin in 1794. Yttrium is a chemical element with symbol Y and atomic number 39. It is a silvery-metallic transition metal....
Strontium was discovered by William Cruickshank in 1787. Strontium is a chemical element with symbol Sr and atomic number 38. Strontium is a soft silver-white or...
Rubidium was discovered by Robert Bunsen and Gustav Kirchhoff in 1861. Rubidium is a chemical element with symbol Rb and atomic number 37. Rubidium is a soft,...
Krypton was discovered and first isolated by William Ramsay and Morris Travers in 1898. Krypton is a chemical element with symbol Kr and atomic number 36....
Bromine was discovered and first isolated by Antoine Jérôme Balard and Leopold Gmelin in 1825. Bromine is a chemical element with symbol Br and atomic number...
Selenium was discovered and first isolated by Jöns Jakob Berzelius and Johann Gottlieb Gahn in 1817. Selenium is a chemical element with symbol Se and atomic number...
Arsenic is a chemical element with symbol As and atomic number 33. Arsenic occurs in many minerals and also as a pure elemental crystal. The main use...
Germanium was discovered by Clemens Winkler in 1886. Germanium is a chemical element with symbol Ge and atomic number 32. It is a lustrous, hard, grayish-white...
Gallium was discovered by Lecoq de Boisbaudran in 1875. Gallium is a chemical element with symbol Ga and atomic number 31. Gallium does not occur as a...
Zinc was discovered by Indian metallurgists before 1000 BC. Zinc is a chemical element with symbol Zn and atomic number 30. In some respects zinc is chemically...
Copper is a chemical element with symbol Cu and atomic number 29. It is a ductile metal with very high thermal and electrical conductivity. Pure copper...
Nickel was discovered and first isolated by Axel Fredrik Cronstedt in 1751. It is a chemical element with symbol Ni and atomic number 28. It is a...
Cobalt was discovered by George Brandt in 1739. Cobalt is a chemical element with symbol Co and atomic number 27. It is always found in chemically...
Iron was discovered before 5000 BC. Iron is a chemical element with symbol Fe and atomic number 26. It is by mass the most common element...
Manganese was discovered by Torbern Olof Bergman in 1770. It is a chemical element with symbol Mn and atomic number 25. It is not found as a...