Chemical element

Lanthanum is a chemical element with symbol La and atomic number 57. It is a soft, ductile, silvery-white metal that tarnishe ...

Chemical element

Promethium is a chemical element with symbol Pm and atomic number 61. All of its isotopes are radioactive; it is extremely ra ...

Chemical element

Samarium is a chemical element with symbol Sm and atomic number 62. It is a moderately hard silvery metal that slowly oxidize ...

Chemical element

Gadolinium is a chemical element with symbol Gd and atomic number 64. Gadolinium is a silvery-white, malleable, and ductile r ...

Chemical element

Terbium is a chemical element with symbol Tb and atomic number 65. It is a silvery-white, rare earth metal that is malleable, ...

Chemical element

Dysprosium is a chemical element with symbol Dy and atomic number 66. It is a rare earth element with a metallic silver luste ...

Chemical element

Holmium is a chemical element with symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare-earth ele ...

Chemical element

Erbium is a chemical element with symbol Er and atomic number 68. A silvery-white solid metal when artificially isolated, nat ...

Chemical element

Thulium is a chemical element with symbol Tm and atomic number 69. It is the thirteenth and third-last element in the lanthan ...

Chemical element

Ytterbium is a chemical element with symbol Yb and atomic number 70. It is the fourteenth and penultimate element in the lant ...

Chemical element

Lutetium is a chemical element with symbol Lu and atomic number 71. It is a silvery white metal, which resists corrosion in d ...

Chemical element

Americium is a synthetic chemical element with symbol Am and atomic number 95. It is radioactive and a transuranic member of ...

Chemical element

Curium is a transuranic radioactive chemical element with symbol Cm and atomic number 96. This element of the actinide series ...

Chemical element

Berkelium is a transuranic radioactive chemical element with symbol Bk and atomic number 97. It is a member of the actinide a ...

Chemical element

Californium is a radioactive chemical element with symbol Cf and atomic number 98. The element was first synthesized in 1950 ...

Chemical element

Einsteinium is a synthetic element with symbol Es and atomic number 99. A member of the actinide series, it is the seventh tr ...

Chemical element

Fermium is a synthetic element with symbol Fm and atomic number 100. It is an actinide and the heaviest element that can be f ...

Chemical element

Mendelevium is a synthetic element with chemical symbol Md and atomic number 101. A metallic radioactive transuranic element ...

Chemical element

Nobelium is a synthetic chemical element with symbol No and atomic number 102. It is named in honor of Alfred Nobel, the inve ...

Chemical element

Lawrencium is a synthetic chemical element with symbol Lr and atomic number 103. It is named in honor of Ernest Lawrence, inv ...

Topic

Neutronium is a hypothetical substance composed purely of neutrons. The word was coined by scientist Andreas von Antropoff in ...

Chemical element

Hydrogen is a chemical element with symbol H and atomic number 1. With a standard atomic weight of 1.008, hydrogen is the lig ...

Chemical element

Helium is a chemical element with symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, mo ...

Chemical element

Lithium compounds, also known as lithium salts, are primarily used as a psychiatric medication. This includes the treatment o ...

Chemical element

Beryllium is a chemical element with symbol Be and atomic number 4. It is a relatively rare element in the universe, usually ...

Chemical element

Boron is a chemical element with symbol B and atomic number 5. Produced entirely by cosmic ray spallation and supernovae and ...

Chemical element

Carbon is a chemical element with symbol C and atomic number 6. It is nonmetallic and tetravalent—making four electrons avail ...

Chemical element

Nitrogen is a chemical element with symbol N and atomic number 7. It was first discovered and isolated by Scottish physician ...

Chemical element

Oxygen is a chemical element with symbol O and atomic number 8. It is a member of the chalcogen group on the periodic table, ...

Chemical element

Fluorine is a chemical element with symbol F and atomic number 9. It is the lightest halogen and exists as a highly toxic pal ...

Chemical element

Neon is a chemical element with symbol Ne and atomic number 10. It is a noble gas. Neon is a colorless, odorless, inert monat ...

Chemical element

Sodium is a chemical element with symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium ...

Chemical element

Magnesium is a chemical element with symbol Mg and atomic number 12. It is a shiny gray solid which bears a close physical re ...

Chemical element

Aluminium or aluminum is a chemical element with symbol Al and atomic number 13. It is a silvery-white, soft, nonmagnetic and ...

Chemical element

Silicon is a chemical element with symbol Si and atomic number 14. It is a hard and brittle crystalline solid with a blue-gre ...

Chemical element

Francium is a chemical element with symbol Fr and atomic number 87. It used to be known as eka-caesium. It is extremely radio ...

Chemical element

Phosphorus is a chemical element with symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white ph ...

Chemical element

Iron is a chemical element with symbol Fe and atomic number 26. It is a metal in the first transition series. It is by mass t ...

Chemical element

Sulfur or sulphur is a chemical element with symbol S and atomic number 16. It is abundant, multivalent, and nonmetallic. Und ...

Chemical element

Chlorine is a chemical element with symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between f ...

Chemical element

Argon is a chemical element with symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. ...

Chemical element

Calcium is a chemical element with symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal th ...

Chemical element

Lead is a chemical element with symbol Pb and atomic number 82. It is a heavy metal that is denser than most common materials ...

Chemical element

Scandium is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic d-block element, it has historic ...

Chemical element

Titanium is a chemical element with symbol Ti and atomic number 22. It is a lustrous transition metal with a silver color, lo ...

Chemical element

Vanadium is a chemical element with symbol V and atomic number 23. It is a hard, silvery-grey, ductile, malleable transition ...

Chemical element

Chromium is a chemical element with symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, ...

Chemical element

Manganese is a chemical element with symbol Mn and atomic number 25. It is not found as a free element in nature; it is often ...

Chemical element

Rhenium is a chemical element with symbol Re and atomic number 75. It is a silvery-gray, heavy, third-row transition metal in ...

Chemical element

Cobalt is a chemical element with symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in c ...

Chemical element

Tungsten, or wolfram, is a chemical element with symbol W and atomic number 74. The name tungsten comes from the former Swedi ...

Chemical element

Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden t ...

Chemical element

Osmium is a chemical element with symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the ...

Chemical element

Copper is a chemical element with symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high t ...

Chemical element

Zinc is a chemical element with symbol Zn and atomic number 30. It is the first element in group 12 of the periodic table. In ...

Chemical element

Gallium is a chemical element with symbol Ga and atomic number 31. It is in group 13 of the periodic table, and thus has simi ...

Chemical element

Germanium is a chemical element with symbol Ge and atomic number 32. It is a lustrous, hard, grayish-white metalloid in the c ...

Chemical element

Arsenic is a chemical element with symbol As and atomic number 33. Arsenic occurs in many minerals, usually in combination wi ...

Chemical element

Selenium is a chemical element with symbol Se and atomic number 34. It is a nonmetal with properties that are intermediate be ...

Chemical element

Iridium is a chemical element with symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of th ...

Chemical element

Bromine is a chemical element with symbol Br and atomic number 35. It is the third-lightest halogen, and is a fuming red-brow ...

Chemical element

Platinum is a chemical element with symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, pre ...

Chemical element

Krypton is a chemical element with symbol Kr and atomic number 36. It is a member of group 18 elements. A colorless, odorless ...

Chemical element

Rubidium is a chemical element with symbol Rb and atomic number 37. Rubidium is a soft, silvery-white metallic element of the ...

Chemical element

Gold is a chemical element with symbol Au and atomic number 79, making it one of the higher atomic number elements that occur ...

Chemical element

Mercury is a chemical element with symbol Hg and atomic number 80. It is commonly known as quicksilver and was formerly named ...

Chemical element

Thallium is a chemical element with symbol Tl and atomic number 81. It is a gray post-transition metal that is not found free ...

Chemical element

Strontium is the chemical element with symbol Sr and atomic number 38. An alkaline earth metal, strontium is a soft silver-wh ...

Chemical element

Yttrium is a chemical element with symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically simila ...

Chemical element

Bismuth is a chemical element with symbol Bi and atomic number 83. It is a pentavalent post-transition metal and one of the p ...

Chemical element

Polonium is a chemical element with symbol Po and atomic number 84. A rare and highly radioactive metal with no stable isotop ...

Chemical element

Astatine is a radioactive chemical element with symbol At and atomic number 85. It is the rarest naturally occurring element ...

Chemical element

Zirconium is a chemical element with symbol Zr and atomic number 40. The name zirconium is taken from the name of the mineral ...

Chemical element

Niobium, formerly known as columbium, is a chemical element with symbol Nb and atomic number 41. It is a soft, grey, crystall ...

Chemical element

Molybdenum is a chemical element with symbol Mo and atomic number 42. The name is from Neo-Latin molybdaenum, from Ancient Gr ...

Chemical element

Technetium is a chemical element with symbol Tc and atomic number 43. It is the lightest element whose isotopes are all radio ...

Chemical element

Ruthenium is a chemical element with symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum ...

Chemical element

Rhodium is a chemical element with symbol Rh and atomic number 45. It is a rare, silvery-white, hard, corrosion-resistant, an ...

Chemical element

Palladium is a chemical element with symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered ...

Chemical element

Silver is a chemical element with symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it exhibits the h ...

Chemical element

Cadmium is a chemical element with symbol Cd and atomic number 48. This soft, bluish-white metal is chemically similar to the ...

Chemical element

Indium is a chemical element with symbol In and atomic number 49. It is a post-transition metal that makes up 0.21 parts per ...

Chemical element

Tin is a chemical element with the symbol Sn and atomic number 50. It is a post-transition metal in group 14 of the periodic ...

Chemical element

Uranium is a chemical element with symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the pe ...

Chemical element

Antimony is a chemical element with symbol Sb and atomic number 51. A lustrous gray metalloid, it is found in nature mainly a ...

Chemical element

Tellurium is a chemical element with symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metall ...

Chemical element

Plutonium is a radioactive chemical element with symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appe ...

Chemical element

Iodine is a chemical element with symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a lustrous ...

Chemical element

Neptunium is a chemical element with symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first tra ...

Chemical element

Xenon is a chemical element with symbol Xe and atomic number 54. It is a colorless, dense, odorless noble gas found in the Ea ...

Chemical element

Caesium or cesium is a chemical element with symbol Cs and atomic number 55. It is a soft, silvery-golden alkali metal with a ...

Chemical element

Protactinium is a chemical element with symbol Pa and atomic number 91. It is a dense, silvery-gray actinide metal which read ...

Chemical element

Barium is a chemical element with symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery a ...

Chemical element

Thorium is a weakly radioactive metallic chemical element with symbol Th and atomic number 90. Thorium is silvery and tarnish ...

Chemical element

Hafnium is a chemical element with symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, ha ...

Chemical element

Actinium is a chemical element with symbol Ac and atomic number 89. It was first isolated by French chemist André-Louis Debie ...

Chemical element

Tantalum is a chemical element with symbol Ta and atomic number 73. Previously known as tantalium, its name comes from Tantal ...

Chemical element

Radium is a chemical element with symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, a ...

Chemical element

Radon is a chemical element with symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless noble ga ...

Chemical element

Rutherfordium is a synthetic chemical element with symbol Rf and atomic number 104, named after physicist Ernest Rutherford. ...

Chemical element

Dubnium is a synthetic chemical element with symbol Db and atomic number 105. Dubnium is highly radioactive: the most stable ...

Chemical element

Seaborgium is a synthetic chemical element with symbol Sg and atomic number 106. It is named after the American nuclear chemi ...

Chemical element

Bohrium is a synthetic chemical element with symbol Bh and atomic number 107. It is named after Danish physicist Niels Bohr. ...

Chemical element

Hassium is a synthetic chemical element with symbol Hs and atomic number 108. It is named after the German state of Hesse. It ...

Chemical element

Meitnerium is a synthetic chemical element with symbol Mt and atomic number 109. It is an extremely radioactive synthetic ele ...

Chemical element

Darmstadtium is a synthetic chemical element with symbol Ds and atomic number 110. It is an extremely radioactive synthetic e ...

Chemical element

Roentgenium is a chemical element with symbol Rg and atomic number 111. It is an extremely radioactive synthetic element that ...

Chemical element

Copernicium is a synthetic chemical element with symbol Cn and atomic number 112. Its known isotopes are extremely radioactiv ...

Chemical element

Nihonium is a synthetic chemical element with the symbol Nh and atomic number 113. It is extremely radioactive; its most stab ...

Chemical element

Flerovium is a superheavy artificial chemical element with symbol Fl and atomic number 114. It is an extremely radioactive sy ...

Chemical element

Moscovium is a synthetic chemical element with symbol Mc and atomic number 115. It was first synthesized in 2003 by a joint t ...

Chemical element

Livermorium is a synthetic chemical element with symbol Lv and has an atomic number of 116. It is an extremely radioactive el ...

Chemical element

Tennessine is a synthetic chemical element with symbol Ts and atomic number 117. It is the second-heaviest known element and ...

Chemical element

Oganesson is a synthetic chemical element with the symbol Og and atomic number 118. It was first synthesized in 2002 at the J ...

Chemical element

Cerium is a chemical element with symbol Ce and atomic number 58. Cerium is a soft, ductile and silvery-white metal that tarn ...

Chemical element

Praseodymium is a chemical element with symbol Pr and atomic number 59. It is the third member of the lanthanide series and i ...

Chemical element

Neodymium is a chemical element with symbol Nd and atomic number 60. It is a soft silvery metal that tarnishes in air. Neodym ...

Chemical element

Europium is a chemical element with symbol Eu and atomic number 63. It was isolated in 1901 and is named after the continent ...