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 ELEMENTSTORY
AArgonOld textbook use for the element argon.
AbAlabamineName given to false discovery of the element astatine
AdAldebaraniumOld name for the element ytterbium
AmAlabamiumAlabamium was a false claim of astatine. Am is used for the element americium.
AnAtheniumAlternate name proposed for the element einsteinium.
AoAusoniumName given to false discovery of neptunium.
AzAzoteOld name for the element nitrogen.
BoBoronOld textbook use for the element boron.
BvBreviumOld name for the element protactinium.
BzBerzeliumAlternate name proposed for the element praseodymium.
CbColumbiumProposed name for the elements niobium and americium.
ChChromiumProposed symbol for the element chromium — Cr is the current accepted symbol.
ClColumbiumColumbium with this symbol was proposed for the element niobium. Cl is the symbol for chlorine.
CpCassiopeiumAlternate name for the element lutetium.
CtCenturiumAlternate name proposed for element 100, fermium.
CtCeltiumOld name for the element hafnium.
DaDanubiumAlternate name proposed for element 43, technetium.
DbDubniumAlternate name and symbol proposed for element 104, rutherfordium. Name and symbol were later used for element 105.
DiDidymiumName and symbol proposed for unknown element found by spectroscopy later found to be a mixture of praseodymium and neodymium.
EEinsteiniumAlternate symbol for the element einsteinium. The currently accepted symbol is Es.
EaEkaaluminiumName given by Mendeleev on his periodic table for the unknown element that should appear below aluminum (gallium was later discovered).
EbEkaboronName given by Mendeleev on his periodic table for the unknown element that should appear below boron (scandium was later discovered).
ElEkaaluminiumAlternate symbol for Ekaaluminium.
EmEkamanganeseName given by Mendeleev on his periodic table for the unknown element that should appear below manganese (technetium was later discovered).
EmEmanationOriginal name given to the radioactive decay product of radium that was later discovered to be the element radon.
EsEkasiliconName given by Mendeleev on his periodic table for the unknown element that should appear below silicon (germanium was later discovered).
EsEsperiumName given to false discovery of plutonium.
FaFranciumProposed symbol for the element francium — Fr is the current accepted symbol.
FlFluorineOld textbook use for the element fluorine. This symbol is currently associated with the element flerovium.
FlFlorentiumName proposed for false discovery of promethium. This symbol is currently associated with the element flerovium.
FrFlorentiumAlternate symbol for florentium, false discovery of promethium. This symbol is currently associated with the element francium.
GGluciniumOld name for the element beryllium.
GlGluciniumAlternate symbol used for glucinium, the old name for beryllium.
HaHahniumProposed name for element 105, dubnium.
HnHahniumProposed name for element 108, hassium.
HyMercuryOld symbol for mercury taken from the latin name hydragyrum.
IIridiumOld symbol for iridium. The current accepted symbol is Ir.
IlIlliniumProposed name for a false discovery of the element promethium.
JJodiumOld symbol and name for the element iodine.
JgJargoniumProposed name for a false discovery of the element hafnium.
JlJoliotiumAlternate proposed name for the element dubnium.
KuKurchatoviumAlternate proposed name for the element rutherfordium.
LwLawrenciumAlternate symbol proposed for element 103, lawrencium. The currently accepted symbol is Lr.
MMuriaticumOld name for the element chlorine. The currently accepted symbol is Cl.
MaManganeseAlternate symbol used for the element manganese. The currently accepted symbol is Mn.
MaMasuriumProposed name for a false discovery of element 43, technetium.
MdMendeleviumOriginally proposed name and symbol for element 97, berkelium. These were eventually used for element 101.
MeMendeleviumOriginal proposal for element 68, erbium. The currently accepted symbol is Er.
MlMoldaviumOriginal proposal for element 87, francium. The currently accepted symbol is Fr.
MsMagnesiumOld symbol used for the element magnesium. The currently accepted symbol is Mg.
MtMeitneriumAlternate proposal for element 91, protactinium. The symbol and name would eventually be used for element 109.
MvMendeleviumAlternate proposal for the symbol for element 101, mendelevium. The currently accepted symbol is Md.
NgNorwegiumProposed name and symbol for false discovery of element 72, hafnium.
NoNoriumProposed name and symbol for false discovery of element 72, hafnium. The symbol is currently used for element 102, nobelium.
NsNeilsbohriumProposed name and symbol for elements 105, dubnium and 107, bohrium.
NtNitonOld name used for element 86, radon.
NuNebuliumName and symbol given to new element seen in spectra of the Cat’s Eye Nebula. Later discovered to be doubly ionized oxygen.
NyNeoytterbiumOld name for element 70, ytterbium.
OdOdiniumAlternate proposal for element 62, samarium.
PLeadOld symbol for lead. The current symbol is Pb. P is the current symbol for element 15, phosphorus.
PaPalladiumOld symbol used for element 46, palladium. This symbol is used for element 91, protactinium.
PePelopiumOld name for element 41, niobium. The currently accepted symbol is Nb.
PlPalladiumAlternate symbol for element 46, palladium. The currently accepted symbol is Pd.
PoPotassiumOld symbol for element 19, potassium. The currently accepted symbol is K. This symbol is used for element 84, polonium.
RRhodiumAlternate symbol proposed for element 45, rhodium. The currently accepted symbol is Rh.
RfRutherfordiumName and symbol proposed for element 106, seaborgium. They are currently used for element 104.
RoRhodiumAlternate symbol proposed for element 45, rhodium. The currently accepted symbol is Rh.
SaSamariumAlternate symbol proposed for element 62, samarium. The currently accepted symbol is Sm.
SoSodiumAlternate symbol once used for element 11, sodium. The currently accepted symbol is Na.
SpSpectriumAlternate proposed name and symbol for element 70, ytterbium.
StTinOld symbol for element 50, tin. Symbol taken from the Latin name stannum.
TnTungstenAlternate symbol for element 74, tungsten. The currently accepted symbol is W.
TuThuliumAlternate symbol for element 69, thulium. The currently accepted symbol is Tm.
TuTungstenAlternate symbol for element 74, tungsten. The currently accepted symbol is W.
TyTyriumAlternate proposal for element 60, neodymium. The currently accepted symbol is Nd.
UnbUnnilbiumPlaceholder name and symbol for element 102, nobelium.
UneUnnilenniumPlaceholder name and symbol for element 109, meitnerium.
UnhUnnilhexiumPlaceholder name and symbol for element 106, seaborgium.
UnoUnniloctiumPlaceholder name and symbol for element 108, hassium.
UnpUnnilpentiumPlaceholder name and symbol for element 105, dubnium.
UnqUnnilquadiumPlaceholder name and symbol for element 104, rutherfordium.
UnsUnnilseptiumPlaceholder name and symbol for element 107, bohrium.
UntUnniltriumPlaceholder name and symbol for element 103, lawrencium.
UnuUnniluniumPlaceholder name and symbol for element 101, mendelevium.
UubUnunbiumPlaceholder name and symbol for element 112, copernicium.
UuhUnunhexiumPlaceholder name and symbol for element 116, livermorium.
UunUnunniliumPlaceholder name and symbol for element 110, darmstadtium.
UuqUnunquadiumPlaceholder name and symbol for element 114, flerovium.
UuuUnununiumPlaceholder name and symbol for element 111, roentgenium.
UrUraniumAlternately used symbol for element 92, uranium. The currently accepted symbol is U.
ViVirginiumProposed name and symbol for false discovery of element 87, francium.
VmVirginiumProposed name and symbol for false discovery of element 87, francium.
YtYttriumAlternate symbol used for element 39, yttrium. The currently accepted symbol is Y.

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