Element Symbols No One Uses


Azote Periodic Table Tile

Azote, symbol Az,  was an old name for the element nitrogen. It is still in use in some non-English speaking countries.

You may be familiar with the element symbols found on the periodic table. These symbols are standardized by the International Union of Pure and Applied Chemistry (IUPAC) for international use.

When a scientist believes he has discovered a new element, he usually announces his discovery along with a new name and element symbol. Alternatively, old textbooks and journals in other countries may have different names and symbols that were changed when the official list was compiled. This table contains a list of old element symbols no one uses anymore but once had a place in the science of chemistry.

SYMBOL  ELEMENT STORY
A Argon Old textbook use for the element argon.
Ab Alabamine Name given to false discovery of the element astatine
Ad Aldebaranium Old name for the element ytterbium
Am Alabamium Alabamium was a false claim of astatine. Am is used for the element americium.
An Athenium Alternate name proposed for the element einsteinium.
Ao Ausonium Name given to false discovery of neptunium.
Az Azote Old name for the element nitrogen.
Bo Boron Old textbook use for the element boron.
Bv Brevium Old name for the element protactinium.
Bz Berzelium Alternate name proposed for the element praseodymium.
Cb Columbium Proposed name for the elements niobium and americium.
Ch Chromium Proposed symbol for the element chromium — Cr is the current accepted symbol.
Cl Columbium Columbium with this symbol was proposed for the element niobium. Cl is the symbol for chlorine.
Cp Cassiopeium Alternate name for the element lutetium.
Ct Centurium Alternate name proposed for element 100, fermium.
Ct Celtium Old name for the element hafnium.
Da Danubium Alternate name proposed for element 43, technetium.
Db Dubnium Alternate name and symbol proposed for element 104, rutherfordium. Name and symbol were later used for element 105.
Di Didymium Name and symbol proposed for unknown element found by spectroscopy later found to be a mixture of praseodymium and neodymium.
E Einsteinium Alternate symbol for the element einsteinium. The currently accepted symbol is Es.
Ea Ekaaluminium Name given by Mendeleev on his periodic table for the unknown element that should appear below aluminum (gallium was later discovered).
Eb Ekaboron Name given by Mendeleev on his periodic table for the unknown element that should appear below boron (scandium was later discovered).
El Ekaaluminium Alternate symbol for Ekaaluminium.
Em Ekamanganese Name given by Mendeleev on his periodic table for the unknown element that should appear below manganese (technetium was later discovered).
Em Emanation Original name given to the radioactive decay product of radium that was later discovered to be the element radon.
Es Ekasilicon Name given by Mendeleev on his periodic table for the unknown element that should appear below silicon (germanium was later discovered).
Es Esperium Name given to false discovery of plutonium.
Fa Francium Proposed symbol for the element francium — Fr is the current accepted symbol.
Fl Fluorine Old textbook use for the element fluorine. This symbol is currently associated with the element flerovium.
Fl Florentium Name proposed for false discovery of promethium. This symbol is currently associated with the element flerovium.
Fr Florentium Alternate symbol for florentium, false discovery of promethium. This symbol is currently associated with the element francium.
G Glucinium Old name for the element beryllium.
Gl Glucinium Alternate symbol used for glucinium, the old name for beryllium.
Ha Hahnium Proposed name for element 105, dubnium.
Hn Hahnium Proposed name for element 108, hassium.
Hy Mercury Old symbol for mercury taken from the latin name hydragyrum.
I Iridium Old symbol for iridium. The current accepted symbol is Ir.
Il Illinium Proposed name for a false discovery of the element promethium.
J Jodium Old symbol and name for the element iodine.
Jg Jargonium Proposed name for a false discovery of the element hafnium.
Jl Joliotium Alternate proposed name for the element dubnium.
Ku Kurchatovium Alternate proposed name for the element rutherfordium.
Lw Lawrencium Alternate symbol proposed for element 103, lawrencium. The currently accepted symbol is Lr.
M Muriaticum Old name for the element chlorine. The currently accepted symbol is Cl.
Ma Manganese Alternate symbol used for the element manganese. The currently accepted symbol is Mn.
Ma Masurium Proposed name for a false discovery of element 43, technetium.
Md Mendelevium Originally proposed name and symbol for element 97, berkelium. These were eventually used for element 101.
Me Mendelevium Original proposal for element 68, erbium. The currently accepted symbol is Er.
Ml Moldavium Original proposal for element 87, francium. The currently accepted symbol is Fr.
Ms Magnesium Old symbol used for the element magnesium. The currently accepted symbol is Mg.
Mt Meitnerium Alternate proposal for element 91, protactinium. The symbol and name would eventually be used for element 109.
Mv Mendelevium Alternate proposal for the symbol for element 101, mendelevium. The currently accepted symbol is Md.
Ng Norwegium Proposed name and symbol for false discovery of element 72, hafnium.
No Norium Proposed name and symbol for false discovery of element 72, hafnium. The symbol is currently used for element 102, nobelium.
Ns Neilsbohrium Proposed name and symbol for elements 105, dubnium and 107, bohrium.
Nt Niton Old name used for element 86, radon.
Nu Nebulium Name and symbol given to new element seen in spectra of the Cat’s Eye Nebula. Later discovered to be doubly ionized oxygen.
Ny Neoytterbium Old name for element 70, ytterbium.
Od Odinium Alternate proposal for element 62, samarium.
P Lead Old symbol for lead. The current symbol is Pb. P is the current symbol for element 15, phosphorus.
Pa Palladium Old symbol used for element 46, palladium. This symbol is used for element 91, protactinium.
Pe Pelopium Old name for element 41, niobium. The currently accepted symbol is Nb.
Pl Palladium Alternate symbol for element 46, palladium. The currently accepted symbol is Pd.
Po Potassium Old symbol for element 19, potassium. The currently accepted symbol is K. This symbol is used for element 84, polonium.
R Rhodium Alternate symbol proposed for element 45, rhodium. The currently accepted symbol is Rh.
Rf Rutherfordium Name and symbol proposed for element 106, seaborgium. They are currently used for element 104.
Ro Rhodium Alternate symbol proposed for element 45, rhodium. The currently accepted symbol is Rh.
Sa Samarium Alternate symbol proposed for element 62, samarium. The currently accepted symbol is Sm.
So Sodium Alternate symbol once used for element 11, sodium. The currently accepted symbol is Na.
Sp Spectrium Alternate proposed name and symbol for element 70, ytterbium.
St Tin Old symbol for element 50, tin. Symbol taken from the Latin name stannum.
Tn Tungsten Alternate symbol for element 74, tungsten. The currently accepted symbol is W.
Tu Thulium Alternate symbol for element 69, thulium. The currently accepted symbol is Tm.
Tu Tungsten Alternate symbol for element 74, tungsten. The currently accepted symbol is W.
Ty Tyrium Alternate proposal for element 60, neodymium. The currently accepted symbol is Nd.
Unb Unnilbium Placeholder name and symbol for element 102, nobelium.
Une Unnilennium Placeholder name and symbol for element 109, meitnerium.
Unh Unnilhexium Placeholder name and symbol for element 106, seaborgium.
Uno Unniloctium Placeholder name and symbol for element 108, hassium.
Unp Unnilpentium Placeholder name and symbol for element 105, dubnium.
Unq Unnilquadium Placeholder name and symbol for element 104, rutherfordium.
Uns Unnilseptium Placeholder name and symbol for element 107, bohrium.
Unt Unniltrium Placeholder name and symbol for element 103, lawrencium.
Unu Unnilunium Placeholder name and symbol for element 101, mendelevium.
Uub Ununbium Placeholder name and symbol for element 112, copernicium.
Uuh Ununhexium Placeholder name and symbol for element 116, livermorium.
Uun Ununnilium Placeholder name and symbol for element 110, darmstadtium.
Uuq Ununquadium Placeholder name and symbol for element 114, flerovium.
Uuu Unununium Placeholder name and symbol for element 111, roentgenium.
Ur Uranium Alternately used symbol for element 92, uranium. The currently accepted symbol is U.
Vi Virginium Proposed name and symbol for false discovery of element 87, francium.
Vm Virginium Proposed name and symbol for false discovery of element 87, francium.
Yt Yttrium Alternate symbol used for element 39, yttrium. The currently accepted symbol is Y.

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