Compounds
Water
A molecular compound that forms extensive hydrogen-bond networks.
Qemvoryx / Reference
A closer look.
Browse 134 reference profiles. Each page links to further reading and distinguishes source data from simplified guidance.
134 records
Compounds
Carbon dioxide
A linear molecular compound made of carbon and oxygen.
Compounds
Sodium chloride
An ionic compound composed of sodium and chloride ions.
Compounds
Ammonia
A nitrogen-containing molecule with a trigonal pyramidal arrangement.
Compounds
Glucose
A simple sugar with several possible structural forms.
Compounds
Methane
The simplest alkane, with a tetrahedral arrangement around carbon.
Compounds
Ethanol
An alcohol containing a hydroxyl group attached to a two-carbon chain.
Compounds
Calcium carbonate
An ionic compound containing calcium and carbonate ions.
Compounds
Sodium hydrogen carbonate
A compound containing sodium and hydrogen carbonate ions.
Compounds
Magnesium oxide
An ionic oxide with a one-to-one magnesium-to-oxygen ratio.
Reaction exercises
Iron oxide atom balance
Elemental iron and oxygen written as an atom-conservation exercise.
Reaction exercises
Methane oxidation balance
An ideal complete-oxidation equation. The model does not describe ignition, real combustion products or operating conditions.
Reaction exercises
Ethane oxidation balance
A hydrocarbon balance in which the smallest oxygen coefficient becomes a whole number only after scaling.
Reaction exercises
Acid-base atom balance
A neutral-formula representation used to practise coefficients; ionic descriptions require a separate treatment.
Reaction exercises
Carbonate product balance
An example showing that a balanced equation can contain one reactant and two products.
Reaction exercises
Nitrogen and hydrogen balance
A compact equation illustrating why diatomic elemental formulas matter. No process conditions are supplied.
Nonmetal
Hydrogen
Hydrogen (H) has atomic number 1. PubChem classifies it as nonmetal.
Noble gas
Helium
Helium (He) has atomic number 2. PubChem classifies it as noble gas.
Alkali metal
Lithium
Lithium (Li) has atomic number 3. PubChem classifies it as alkali metal.
Alkaline earth metal
Beryllium
Beryllium (Be) has atomic number 4. PubChem classifies it as alkaline earth metal.
Metalloid
Boron
Boron (B) has atomic number 5. PubChem classifies it as metalloid.
Nonmetal
Carbon
Carbon (C) has atomic number 6. PubChem classifies it as nonmetal.
Nonmetal
Nitrogen
Nitrogen (N) has atomic number 7. PubChem classifies it as nonmetal.
Nonmetal
Oxygen
Oxygen (O) has atomic number 8. PubChem classifies it as nonmetal.
Halogen
Fluorine
Fluorine (F) has atomic number 9. PubChem classifies it as halogen.
Noble gas
Neon
Neon (Ne) has atomic number 10. PubChem classifies it as noble gas.
Alkali metal
Sodium
Sodium (Na) has atomic number 11. PubChem classifies it as alkali metal.
Alkaline earth metal
Magnesium
Magnesium (Mg) has atomic number 12. PubChem classifies it as alkaline earth metal.
Post-transition metal
Aluminum
Aluminum (Al) has atomic number 13. PubChem classifies it as post-transition metal.
Metalloid
Silicon
Silicon (Si) has atomic number 14. PubChem classifies it as metalloid.
Nonmetal
Phosphorus
Phosphorus (P) has atomic number 15. PubChem classifies it as nonmetal.
Nonmetal
Sulfur
Sulfur (S) has atomic number 16. PubChem classifies it as nonmetal.
Halogen
Chlorine
Chlorine (Cl) has atomic number 17. PubChem classifies it as halogen.
Noble gas
Argon
Argon (Ar) has atomic number 18. PubChem classifies it as noble gas.
Alkali metal
Potassium
Potassium (K) has atomic number 19. PubChem classifies it as alkali metal.
Alkaline earth metal
Calcium
Calcium (Ca) has atomic number 20. PubChem classifies it as alkaline earth metal.
Transition metal
Scandium
Scandium (Sc) has atomic number 21. PubChem classifies it as transition metal.
Transition metal
Titanium
Titanium (Ti) has atomic number 22. PubChem classifies it as transition metal.
Transition metal
Vanadium
Vanadium (V) has atomic number 23. PubChem classifies it as transition metal.
Transition metal
Chromium
Chromium (Cr) has atomic number 24. PubChem classifies it as transition metal.
Transition metal
Manganese
Manganese (Mn) has atomic number 25. PubChem classifies it as transition metal.
Transition metal
Iron
Iron (Fe) has atomic number 26. PubChem classifies it as transition metal.
Transition metal
Cobalt
Cobalt (Co) has atomic number 27. PubChem classifies it as transition metal.
Transition metal
Nickel
Nickel (Ni) has atomic number 28. PubChem classifies it as transition metal.
Transition metal
Copper
Copper (Cu) has atomic number 29. PubChem classifies it as transition metal.
Transition metal
Zinc
Zinc (Zn) has atomic number 30. PubChem classifies it as transition metal.
Post-transition metal
Gallium
Gallium (Ga) has atomic number 31. PubChem classifies it as post-transition metal.
Metalloid
Germanium
Germanium (Ge) has atomic number 32. PubChem classifies it as metalloid.
Metalloid
Arsenic
Arsenic (As) has atomic number 33. PubChem classifies it as metalloid.
Nonmetal
Selenium
Selenium (Se) has atomic number 34. PubChem classifies it as nonmetal.
Halogen
Bromine
Bromine (Br) has atomic number 35. PubChem classifies it as halogen.
Noble gas
Krypton
Krypton (Kr) has atomic number 36. PubChem classifies it as noble gas.
Alkali metal
Rubidium
Rubidium (Rb) has atomic number 37. PubChem classifies it as alkali metal.
Alkaline earth metal
Strontium
Strontium (Sr) has atomic number 38. PubChem classifies it as alkaline earth metal.
Transition metal
Yttrium
Yttrium (Y) has atomic number 39. PubChem classifies it as transition metal.
Transition metal
Zirconium
Zirconium (Zr) has atomic number 40. PubChem classifies it as transition metal.
Transition metal
Niobium
Niobium (Nb) has atomic number 41. PubChem classifies it as transition metal.
Transition metal
Molybdenum
Molybdenum (Mo) has atomic number 42. PubChem classifies it as transition metal.
Transition metal
Technetium
Technetium (Tc) has atomic number 43. PubChem classifies it as transition metal.
Transition metal
Ruthenium
Ruthenium (Ru) has atomic number 44. PubChem classifies it as transition metal.
Transition metal
Rhodium
Rhodium (Rh) has atomic number 45. PubChem classifies it as transition metal.
Transition metal
Palladium
Palladium (Pd) has atomic number 46. PubChem classifies it as transition metal.
Transition metal
Silver
Silver (Ag) has atomic number 47. PubChem classifies it as transition metal.
Transition metal
Cadmium
Cadmium (Cd) has atomic number 48. PubChem classifies it as transition metal.
Post-transition metal
Indium
Indium (In) has atomic number 49. PubChem classifies it as post-transition metal.
Post-transition metal
Tin
Tin (Sn) has atomic number 50. PubChem classifies it as post-transition metal.
Metalloid
Antimony
Antimony (Sb) has atomic number 51. PubChem classifies it as metalloid.
Metalloid
Tellurium
Tellurium (Te) has atomic number 52. PubChem classifies it as metalloid.
Halogen
Iodine
Iodine (I) has atomic number 53. PubChem classifies it as halogen.
Noble gas
Xenon
Xenon (Xe) has atomic number 54. PubChem classifies it as noble gas.
Alkali metal
Cesium
Cesium (Cs) has atomic number 55. PubChem classifies it as alkali metal.
Alkaline earth metal
Barium
Barium (Ba) has atomic number 56. PubChem classifies it as alkaline earth metal.
Lanthanide
Lanthanum
Lanthanum (La) has atomic number 57. PubChem classifies it as lanthanide.
Lanthanide
Cerium
Cerium (Ce) has atomic number 58. PubChem classifies it as lanthanide.
Lanthanide
Praseodymium
Praseodymium (Pr) has atomic number 59. PubChem classifies it as lanthanide.
Lanthanide
Neodymium
Neodymium (Nd) has atomic number 60. PubChem classifies it as lanthanide.
Lanthanide
Promethium
Promethium (Pm) has atomic number 61. PubChem classifies it as lanthanide.
Lanthanide
Samarium
Samarium (Sm) has atomic number 62. PubChem classifies it as lanthanide.
Lanthanide
Europium
Europium (Eu) has atomic number 63. PubChem classifies it as lanthanide.
Lanthanide
Gadolinium
Gadolinium (Gd) has atomic number 64. PubChem classifies it as lanthanide.
Lanthanide
Terbium
Terbium (Tb) has atomic number 65. PubChem classifies it as lanthanide.
Lanthanide
Dysprosium
Dysprosium (Dy) has atomic number 66. PubChem classifies it as lanthanide.
Lanthanide
Holmium
Holmium (Ho) has atomic number 67. PubChem classifies it as lanthanide.
Lanthanide
Erbium
Erbium (Er) has atomic number 68. PubChem classifies it as lanthanide.
Lanthanide
Thulium
Thulium (Tm) has atomic number 69. PubChem classifies it as lanthanide.
Lanthanide
Ytterbium
Ytterbium (Yb) has atomic number 70. PubChem classifies it as lanthanide.
Lanthanide
Lutetium
Lutetium (Lu) has atomic number 71. PubChem classifies it as lanthanide.
Transition metal
Hafnium
Hafnium (Hf) has atomic number 72. PubChem classifies it as transition metal.
Transition metal
Tantalum
Tantalum (Ta) has atomic number 73. PubChem classifies it as transition metal.
Transition metal
Tungsten
Tungsten (W) has atomic number 74. PubChem classifies it as transition metal.
Transition metal
Rhenium
Rhenium (Re) has atomic number 75. PubChem classifies it as transition metal.
Transition metal
Osmium
Osmium (Os) has atomic number 76. PubChem classifies it as transition metal.
Transition metal
Iridium
Iridium (Ir) has atomic number 77. PubChem classifies it as transition metal.
Transition metal
Platinum
Platinum (Pt) has atomic number 78. PubChem classifies it as transition metal.
Transition metal
Gold
Gold (Au) has atomic number 79. PubChem classifies it as transition metal.
Transition metal
Mercury
Mercury (Hg) has atomic number 80. PubChem classifies it as transition metal.
Post-transition metal
Thallium
Thallium (Tl) has atomic number 81. PubChem classifies it as post-transition metal.
Post-transition metal
Lead
Lead (Pb) has atomic number 82. PubChem classifies it as post-transition metal.
Post-transition metal
Bismuth
Bismuth (Bi) has atomic number 83. PubChem classifies it as post-transition metal.
Metalloid
Polonium
Polonium (Po) has atomic number 84. PubChem classifies it as metalloid.
Halogen
Astatine
Astatine (At) has atomic number 85. PubChem classifies it as halogen.
Noble gas
Radon
Radon (Rn) has atomic number 86. PubChem classifies it as noble gas.
Alkali metal
Francium
Francium (Fr) has atomic number 87. PubChem classifies it as alkali metal.
Alkaline earth metal
Radium
Radium (Ra) has atomic number 88. PubChem classifies it as alkaline earth metal.
Actinide
Actinium
Actinium (Ac) has atomic number 89. PubChem classifies it as actinide.
Actinide
Thorium
Thorium (Th) has atomic number 90. PubChem classifies it as actinide.
Actinide
Protactinium
Protactinium (Pa) has atomic number 91. PubChem classifies it as actinide.
Actinide
Uranium
Uranium (U) has atomic number 92. PubChem classifies it as actinide.
Actinide
Neptunium
Neptunium (Np) has atomic number 93. PubChem classifies it as actinide.
Actinide
Plutonium
Plutonium (Pu) has atomic number 94. PubChem classifies it as actinide.
Actinide
Americium
Americium (Am) has atomic number 95. PubChem classifies it as actinide.
Actinide
Curium
Curium (Cm) has atomic number 96. PubChem classifies it as actinide.
Actinide
Berkelium
Berkelium (Bk) has atomic number 97. PubChem classifies it as actinide.
Actinide
Californium
Californium (Cf) has atomic number 98. PubChem classifies it as actinide.
Actinide
Einsteinium
Einsteinium (Es) has atomic number 99. PubChem classifies it as actinide.
Actinide
Fermium
Fermium (Fm) has atomic number 100. PubChem classifies it as actinide.
Actinide
Mendelevium
Mendelevium (Md) has atomic number 101. PubChem classifies it as actinide.
Actinide
Nobelium
Nobelium (No) has atomic number 102. PubChem classifies it as actinide.
Actinide
Lawrencium
Lawrencium (Lr) has atomic number 103. PubChem classifies it as actinide.
Transition metal
Rutherfordium
Rutherfordium (Rf) has atomic number 104. PubChem classifies it as transition metal.
Transition metal
Dubnium
Dubnium (Db) has atomic number 105. PubChem classifies it as transition metal.
Transition metal
Seaborgium
Seaborgium (Sg) has atomic number 106. PubChem classifies it as transition metal.
Transition metal
Bohrium
Bohrium (Bh) has atomic number 107. PubChem classifies it as transition metal.
Transition metal
Hassium
Hassium (Hs) has atomic number 108. PubChem classifies it as transition metal.
Transition metal
Meitnerium
Meitnerium (Mt) has atomic number 109. PubChem classifies it as transition metal.
Transition metal
Darmstadtium
Darmstadtium (Ds) has atomic number 110. PubChem classifies it as transition metal.
Transition metal
Roentgenium
Roentgenium (Rg) has atomic number 111. PubChem classifies it as transition metal.
Transition metal
Copernicium
Copernicium (Cn) has atomic number 112. PubChem classifies it as transition metal.
Post-transition metal
Nihonium
Nihonium (Nh) has atomic number 113. PubChem classifies it as post-transition metal.
Post-transition metal
Flerovium
Flerovium (Fl) has atomic number 114. PubChem classifies it as post-transition metal.
Post-transition metal
Moscovium
Moscovium (Mc) has atomic number 115. PubChem classifies it as post-transition metal.
Post-transition metal
Livermorium
Livermorium (Lv) has atomic number 116. PubChem classifies it as post-transition metal.
Halogen
Tennessine
Tennessine (Ts) has atomic number 117. PubChem classifies it as halogen.
Noble gas
Oganesson
Oganesson (Og) has atomic number 118. PubChem classifies it as noble gas.