List of elements by symbol
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Symbols currently recognized by IUPAC
Proposed or Withdrawn Symbols Not In Current Use
| Sym | Name | No | Source |
| A | argon | 18 | Current symbol is Ar. |
| Ab | alabamine | 85 | Discredited claim to discovery of astatine. |
| An | actinon | 86 | Name given at one time to an isotope of radon identified in the decay chain of actinium. |
| Ao | ausonium | 93 | Discredited claim to discovery of Neptunium. |
| Cb | columbium | 41 | A former name of niobium. |
| Cp | cassiopeium | 71 | Proposed name for lutetium. |
| Ct | centurium | 100 | Proposed name for fermium. |
| Db | dubnium | 104 | Proposed name for rutherfordium. The symbol and name were instead used for element 105. |
| Di | didymium | - | Rare earth metal that proved to be a mixture of the elements praseodymium and neodymium. |
| Dp | decipium | 62 | Rare earth metal that proved to be a mixture primarily of samarium. |
| Eb | ekaboron | 21 | Name given by Mendeleev to an as of then undiscovered element. When discovered, scandium closely matched the prediction. |
| El | ekaaluminium | 31 | Name given by Mendeleev to an as of then undiscovered element. When discovered, gallium closely matched the prediction. |
| Es | ekasilicon | 32 | Name given by Mendeleev to an as of then undiscovered element. When discovered, germanium closely matched the prediction. |
| Es | esperium | 94 | Discredited claim to discovery of plutonium. |
| Fa | francium | 87 | Current symbol is Fr. |
| Fr | florentium | 61 | Discredited claim to discovery of promethium. |
| Gl | glucinium | 4 | A former name of beryllium. |
| Ha | hahnium | 105 | Proposed name for dubnium. |
| Ha | hahnium | 108 | Proposed name for hassium. |
| Il | illinium | 61 | Discredited claim to discovery of promethium. |
| Io | ionium | 90 | Name given at one time to an isotope of thorium identified in the decay chain of uranium. |
| J | iodine | 53 | In some languages, the name for iodine begins with J instead of I |
| Jo | joliotium | 105 | Proposed name for dubnium. |
| Ku | kurchatovium | 104 | Proposed name for rutherfordium. |
| Lw | lawrencium | 103 | Current symbol is Lr. |
| M | muriaticum | 9 | A former name of chlorine. |
| Ma | masurium | 43 | Disputed claim to discovery of technetium. |
| Md | mendelevium | 97 | Proposed name for berkelium. The symbol and name were later used for element 101. |
| Ms | masrium | - | Discredited claim of discovery of a new element. |
| Mv | mendelevium | 101 | Current symbol is Md. |
| Ni | niton | 86 | Proposed name for radium. |
| Ns | nielsbohrium | 105 | Proposed name for dubnium. |
| Ns | nielsbohrium | 107 | Proposed name for bohrium. |
| Ny | neoytterbium | 70 | A former name of ytterbium. |
| Po | potassium | 19 | Current symbol is K. |
| Pp | philippium | - | Rare earth metal that proved to be a mixture of other elements. |
| Rf | rutherfordium | 106 | Proposed name for seaborgium. The symbol and name were instead used for element 104. |
| Sa | samarium | 62 | Current symbol is Sm. |
| So | sodium | 11 | Current symbol is Na. |
| Tn | thoron | 86 | Name given at one time to an isotope of radon identified in the decay chain of thorium. |
| Tn | tungsten | 74 | Current symbol is W. |
| Tu | thulium | 69 | Current symbol is Tm. |
| Tu | tungsten | 74 | Current symbol is W. |
| Unb | unnilbium | 102 | Temporary name given to nobelium until the permanent name was chosen. |
| Une | unnilennium | 109 | Temporary name given to meitnerium until the permanent name was chosen. |
| Unh | unnilhexium | 106 | Temporary name given to seaborgium until the permanent name was chosen. |
| Uno | unniloctium | 108 | Temporary name given to hassium until the permanent name was chosen. |
| Unp | unnilpentium | 105 | Temporary name given to dubnium until the permanent name was chosen. |
| Unq | unnilquadium | 104 | Temporary name given to rutherfordium until the permanent name was chosen. |
| Uns | unnilseptium | 107 | Temporary name given to bohrium until the permanent name was chosen. |
| Unt | unniltrium | 103 | Temporary name given to lawrencium until the permanent name was chosen. |
| Unu | unnilunium | 101 | Temporary name given to mendelevium until the permanent name was chosen. |
| Uun | ununnilium | 110 | Temporary name given to darmstadtium until the permanent name was chosen. |
| Uuu | unununium | 111 | Temporary name given to roentgenium until the permanent name was chosen. |
| Vi | virginium | 87 | Discredited claim to discovery of francium. |
| Yt | yttrium | 39 | Current symbol is Y. |
External Links
- Berzelius? List of Elements (http://web.lemoyne.edu/~giunta/berzelius.html)
- History of IUPAC Atomic Weight Values (1883 to 1997) (http://www.iupac.org/reports/1998/7001coplen/history.pdf)