thermal expansion 7/27
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[[chemistry]]
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**"a charged chemical species composed of two or more atoms covalently bonded or of a metal complex, that can be considered to be acting as a single unit"
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| **Name** | **Formula** |
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| ---------------------------------------------- | ----------- |
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| **Polyatomic ions (carrying negative charge)** | |
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| Hydroxide | OH– |
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| Acetate | CH3COO– |
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| Cyanide | CN– |
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| Chlorate | ClO3– |
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| Chlorite | ClO2– |
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| Nitrate | NO3– |
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| Nitrite | NO2– |
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| Hypochlorite | OCl– |
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| Hypobromite | OBr – |
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| Iodate | IO3– |
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| Bisulphite | HSO3– |
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| Bisulphate | HSO4– |
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| Permanganate | MnO4– |
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| Thiocyanate | SCN– |
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| Hydrogen carbonate | HCO3– |
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| Carbonate | CO32- |
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| Sulphate | SO42- |
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| Sulphite | SO32- |
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| Oxalate | C2O42- |
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| Silicate | SiO32- |
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| Manganate | MnO42- |
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| Thiosulphate | S2O32- |
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| Chromate | CrO42- |
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| Dichromate | Cr2O72- |
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| Phosphate | PO43- |
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| Phosphite | PO33- |
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| Aluminate | AlO33- |
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| Arsenite | AsO33- |
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| Arsenate | AsO43- |
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| Borate | BO33- |
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| Pyrophosphate | P2O74- |
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| **Polyatomic ions (carrying positive charge)** | |
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| Ammonium | NH4+ |
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## List of monatomic ions
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- The ions made of a single atom are called **simple ions or monatomic ions**.
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| **Name** | **Formula** |
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| --------------------------------------------- | ----------- |
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| **Monatomic ions (carrying positive charge)** | |
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| Hydrogen | H+ |
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| Potassium | K+ |
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| Sodium | Na+ |
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| Silver | Ag+ |
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| Cuprous | Cu+ |
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| Aurous | Au+ |
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| Barium | Ba2+ |
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| Calcium | Ca2+ |
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| Magnesium | Mg2+ |
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| Cupric | Cu2+ |
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| Ferrous | Fe2+ |
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| Stannous | Sn2+ |
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| Mercuric | Hg2+ |
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| Zinc | Zn2+ |
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| Plumbous | Pb2+ |
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| Aluminum | Al3+ |
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| Ferric | Fe3+ |
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| Auric | Au3+ |
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| Arseneous | As3+ |
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| Plumbic | Pb4+ |
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| Stannic | Sn4+ |
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| **Monatomic ions (carrying negative charge)** | |
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| Chloride | Cl– |
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| Bromide | Br – |
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| Iodide | I– |
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| Oxide | O2- |
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| Sulphide | S2- |
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| Nitride | N3- |
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| Phosphide | P3- |
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