විකිමීඩියා ලැයිස්තු ලිපිය From Wikipedia, the free encyclopedia
රසායනික මූලද්රව්යවල සංකේත යනු රසායනික මූලද්රව්යය කෙටි කර දැක්වීම සදහා භාවිතා කරන කෙටි යෙදුම් වේ.සාමාන්යයෙන් මේවා ඉංග්රිසි අකුරු එකකින් හෝ දෙකකින් සමන්විත වේ. අකුරු දෙකක් ඇතිවිට පලමු අකුර කැපිටල් අකුරක් වන අතර දෙවන අකුර සිම්පල් අකුරකි. එක් අකුරක් නම් එය කැපිටල් අකුරකි. තාවකාලික නම් සදහා අකුරු 3ක් ඇත.මෙම සංකේත විශාල ලෙස භාවිතා වන්නේ රසායන විද්යාවේදි වන අතර මෙම නාමකරණය අන්තර්ජාතික ශුද්ධ හා ව්යවහාරික රසායන විද්යා සංගමය මගින් සිදුකරයි International Union of Pure and Applied Chemistry. සමහරක් පැරණි සංකේත තවදුරටත් භාවිතා නොකරන අවස්ථාද පවතී.
ආවර්තිතා වගුවෙහි ඇති මූලද්රව්ය කාණ්ඩ
ලෝහ | ලෝහාලෝහ | අලෝහ | අඥාත රසායනික ගුණ | |||||||
ක්ෂාර ලෝහ | ක්ෂාරීය පාංශු ලෝහ | අන්තර් ආන්තරික ලෝහ | ආන්තරික ලෝහ | පශ්චාත් ආන්තරික ලෝහ | අනෙකුත් අලෝහ | හැලජන | නිෂ්ක්රිය වායු | |||
ලැන්තනන | ඇක්ටිනික |
සංකේතය | නම | සංකේතයෙහි නිරුක්තිය | පරමාණුක ක්රමාංකය | සාපේක්ෂ පරමාණුක ස්කන්ධය | කාණ්ඩය | ආවර්තය |
---|---|---|---|---|---|---|
Ac | Actinium | from Greek aktinos | 89 | [1] | [227]7 | |
Ag | Silver | Latin argentum | 47 | [2] | 107.8682(2)11 | 5 |
Al | Aluminium (Aluminum) | Latin alumen | 13 | 26.9815386(8) | 13 | 3 |
Am | Americium | the Americas | 95 | [1] | [243]7 | |
Ar | Argon | Greek argon | 18 | [2][3] | 39.948(1)18 | 3 |
As | Arsenic | Greek arsenikos | 33 | 74.92160(2) | 15 | 4 |
At | Astatine | Greek astatos | 85 | [1] | [210]17 | 6 |
Au | Gold | Latin aurum | 79 | 196.966569(4) | 11 | 6 |
B | Boron | borax | 5 | [2][3][4] | 10.811(7)13 | 2 |
Ba | Barium | Greek barys | 56 | 137.327(7) | 2 | 6 |
Be | Beryllium | beryl | 4 | 9.012182(3) | 2 | 2 |
Bh | Bohrium | Niels Bohr | 107 | [1] | [264]7 | 7 |
Bi | Bismuth | from German wissmuth, becoming bismuth in English | 83 | 208.98040(1) | 15 | 6 |
Bk | Berkelium | Berkeley, California | 97 | [1] | [247]7 | |
Br | Bromine | Greek bromos | 35 | 79.904(1) | 17 | 4 |
C | Carbon | Latin carbo | 6 | [2][3] | 12.0107(8)14 | 2 |
Ca | කැල්සියම් | Latin calx | 20 | [2] | 40.078(4)2 | 4 |
Cd | Cadmium | from Greek kadmia | 48 | [2] | 112.411(8)12 | 5 |
Ce | Cerium | Ceres | 58 | [2] | 140.116(1)6 | |
Cf | Californium | State and University of California | 98 | [1] | [251]7 | |
Cl | Chlorine | Greek chloros | 17 | [2][3][4] | 35.453(2)17 | 3 |
Cm | Curium | Pierre and Marie Curie and the traditional -um ending | 96 | [1] | [247]7 | |
Cn | Copernicium | Nicolaus Copernicus | 112 | [1] | [285]12 | 7 |
Co | Cobalt | from German kobold | 27 | 58.933195(5) | 9 | 4 |
Cr | Chromium | Greek chroma | 24 | 51.9961(6) | 6 | 4 |
Cs | Caesium (Cesium) | Latin caesius | 55 | 132.9054519(2) | 1 | 6 |
Cu | තඹ | Latin Cuprum | 29 | [3] | 63.546(3)11 | 4 |
Db | Dubnium | Dubna, රුසියාව | 105 | [1] | [262]5 | 7 |
Ds | Darmstadtium | Darmstadt, ජර්මනිය | 110 | [1] | [271]10 | 7 |
Dy | Dysprosium | Greek dysprositos | 66 | [2] | 162.500(1)6 | |
Er | Erbium | Ytterby, Sweden | 68 | [2] | 167.259(3)6 | |
Es | Einsteinium | Albert Einstein | 99 | [1] | [252]7 | |
Eu | Europium | Europe | 63 | [2] | 151.964(1)6 | |
F | Fluorine | Latin fluo | 9 | 18.9984032(5) | 17 | 2 |
Fe | Iron | Latin ferrum | 26 | 55.845(2) | 8 | 4 |
Fm | Fermium | Enrico Fermi | 100 | [1] | [257]7 | |
Fr | Francium | France | 87 | [1] | [223]1 | 7 |
Ga | Gallium | Latin Gallia | 31 | 69.723(1) | 13 | 4 |
Gd | Gadolinium | gadolinite | 64 | [2] | 157.25(3)6 | |
Ge | Germanium | Germany | 32 | 72.64(1) | 14 | 4 |
H | Hydrogen | Greek hydrogenes | 1 | [2][3][4] | 1.00794(7)1 | 1 |
He | Helium | Greek helios | 2 | [2][3] | 4.002602(2)18 | 1 |
Hf | Hafnium | Latin Hafnia | 72 | 178.49(2) | 4 | 6 |
Hg | Mercury | Latin hydrargyrum | 80 | 200.59(2) | 12 | 6 |
Ho | Holmium | Latin Holmia | 67 | 164.930 32(2) | 6 | |
Hs | Hassium | Hesse, ජර්මනිය | 108 | [1] | [277]8 | 7 |
I | Iodine | Greek ioeides | 53 | 126.904 47(3) | 17 | 5 |
In | Indium | indigo blue | 49 | 114.818(3) | 13 | 5 |
Ir | Iridium | Greek iris | 77 | 192.217(3) | 9 | 6 |
K | Potassium (Kalium) | Latin kalium | 19 | 39.0983(1) | 1 | 4 |
Kr | Krypton | Greek kryptos | 36 | [2][4] | 83.798(2)18 | 4 |
La | Lanthanum | Greek lanthanien | 57 | [2] | 138.90547(7)6 | |
Li | Lithium | Greek lithos | 3 | [2][3][4][5] | 6.941(2)1 | 2 |
Lr | Lawrencium | Ernest O. Lawrence | 103 | [1] | [262]3 | 7 |
Lu | Lutetium | Latin Lutetia | 71 | [2] | 174.967(1)3 | 6 |
Md | Mendelevium | Dmitri Mendeleyev | 101 | [1] | [258]7 | |
Mg | Magnesium | Magnesia, Greece | 12 | 24.3050(6) | 2 | 3 |
Mn | Manganese | Latin magnes | 25 | 54.938045(5) | 7 | 4 |
Mo | Molybdenum | Greek molybdos | 42 | [2] | 95.94(2)6 | 5 |
Mt | Meitnerium | Lise Meitner | 109 | [1] | [268]9 | 7 |
N | Nitrogen | Greek nitron | 7 | [2][3] | 14.0067(2)15 | 2 |
Na | සෝඩියම් | Latin natrium | 11 | 22.98976928(2) | 1 | 3 |
Nb | Niobium | Niobe | 41 | 92.906 38(2) | 5 | 5 |
Nd | Neodymium | Greek neos didymos | 60 | [2] | 144.242(3)6 | |
Ne | Neon | Greek neos | 10 | [2][4] | 20.1797(6)18 | 2 |
Ni | Nickel | German kupfernickel | 28 | 58.6934(2) | 10 | 4 |
No | Nobelium | Alfred Nobel | 102 | [1] | [259]7 | |
Np | Neptunium | Neptune | 93 | [1] | [237]7 | |
O | Oxygen | Greek oxys | 8 | [2][3] | 15.9994(3)16 | 2 |
Os | Osmium | Greek osme | 76 | [2] | 190.23(3)8 | 6 |
P | Phosphorus | Greek phosphoros | 15 | 30.973762(2) | 15 | 3 |
Pa | Protactinium | Greek protos and actinium | 91 | [1] | 231.03588(2)7 | |
Pb | Lead | Latin plumbum | 82 | [2][3] | 207.2(1)14 | 6 |
Pd | Palladium | Pallas (genitive Pallados) | 46 | [2] | 106.42(1)10 | 5 |
Pm | Promethium | Prometheus | 61 | [1] | [145]6 | |
Po | Polonium | Poland | 84 | [1] | [210]16 | 6 |
Pr | Praseodymium | Greek prasios | 59 | 140.90765(2) | 6 | |
Pt | Platinum | Greek platina | 78 | 195.084(9) | 10 | 6 |
Pu | Plutonium | Pluto | 94 | [1] | [244]7 | |
Ra | Radium | Latin radius | 88 | [1] | [226]2 | 7 |
Rb | Rubidium | Latin rubidus | 37 | [2] | 85.4678(3)1 | 5 |
Re | Rhenium | German Rheinprovinz | 75 | 186.207(1) | 7 | 6 |
Rf | Rutherfordium | Ernest Rutherford | 104 | [1] | 2614 | 7 |
Rg | Roentgenium | Wilhelm Conrad Röntgen | 111 | [1] | [272]11 | 7 |
Rh | Rhodium | Greek rhodon | 45 | 102.905 50(2) | 9 | 5 |
Rn | Radon | radium and emanation | 86 | [1] | [220]18 | 6 |
Ru | Ruthenium | Latin Ruthenia | 44 | [2] | 101.07(2)8 | 5 |
S | Sulfur (Sulphur) | Latin sulfur | 16 | [2][3] | 32.065(5)16 | 3 |
Sb | Antimony | Latin stibium | 51 | [2] | 121.760(1)15 | 5 |
Sc | Scandium | Scandinavia | 21 | 44.955912(6) | 3 | 4 |
Se | Selenium | Greek selene | 34 | [3] | 78.96(3)16 | 4 |
Sg | Seaborgium | Glenn T. Seaborg | 106 | [1] | [266]6 | 7 |
Si | Silicon | Latin silex | 14 | [3] | 28.0855(3)14 | 3 |
Sm | Samarium | samarskite | 62 | [2] | 150.36(2)6 | |
Sn | Tin | Latin stannum | 50 | [2] | 118.710(7)14 | 5 |
Sr | Strontium | Gaelic Strontian | 38 | [2][3] | 87.62(1)2 | 5 |
Ta | Tantalum | King Tantalus | 73 | 180.94788(2) | 5 | 6 |
Tb | Terbium | Ytterby, Sweden | 65 | 158.92535(2) | 6 | |
Tc | Technetium | Greek technetos | 43 | [1] | [98]7 | 5 |
Te | Tellurium | Greek tellus | 52 | [2] | 127.60(3)16 | 5 |
Th | Thorium | Thor | 90 | [1][2] | 232.03806(2)7 | |
Ti | Titanium | the Titans | 22 | 47.867(1) | 4 | 4 |
Tl | Thallium | Greek thallos | 81 | 204.3833(2) | 13 | 6 |
Tm | Thulium | Thule and the traditional -ium ending | 69 | 168.93421(2) | 6 | |
U | Uranium | Uranus | 92 | [1][2][4] | 238.02891(3)7 | |
Uuh | Ununhexium | Latin uni, uni, and Greek hex | 116 | [1] | [292]16 | 7 |
Uuo | Ununoctium | Latin uni, uni, and oct | 118 | [1] | [294]18 | 7 |
Uup | Ununpentium | Latin uni, uni, and Greek pent | 115 | [1] | [288]15 | 7 |
Uuq | Ununquadium | Latin uni, uni, and quadr | 114 | [1] | [289]14 | 7 |
Uus | Ununseptium | Latin uni, uni, and Greek sept | 117 | [1] | [295]17 | 7 |
Uut | Ununtrium | Latin uni, uni, and Greek tri | 113 | [1] | [284]13 | 7 |
V | Vanadium | Vanadis | 23 | 50.9415(1) | 5 | 4 |
W | Tungsten | German wolfram | 74 | 183.84(1) | 6 | 6 |
Xe | Xenon | Greek xenos | 54 | [2][4] | 131.293(6)18 | 5 |
Y | Yttrium | Ytterby, Sweden | 39 | 88.90585(2) | 3 | 5 |
Yb | Ytterbium | Ytterby, Sweden | 70 | [2] | 173.04(3)6 | |
Zn | Zinc | German zink | 30 | 65.409(4) | 12 | 4 |
Zr | Zirconium | zircon | 40 | [2] | 91.224(2)4 | 5 |
ආවර්තිතා වගුවෙහි ඇති මූලද්රව්ය කාණ්ඩ
ලෝහ | ලෝහාලෝහ | අලෝහ | අඥාත රසායනික ගුණ | |||||||
ක්ෂාර ලෝහ | ක්ෂාරීය පාංශු ලෝහ | අන්තර් ආන්තරික ලෝහ | ආන්තරික ලෝහ | පශ්චාත් ආන්තරික ලෝහ | අනෙකුත් අලෝහ | හැලජන | නිෂ්ක්රිය වායු | |||
ලැන්තනන | ඇක්ටිනික |
The following is a list of names formerly used or suggested for use in naming the elements listed above. Also included in this list are placeholder names and names given by discredited claimants for discovery. Names which retain local use (as with aluminum and jod, for aluminium and iodine respectively) are not included in this table.
Chemical symbol | Name | Atomic number | Origin of symbol | Why not used |
---|---|---|---|---|
A | Argon | 18 | Current symbol is Ar. | [6] |
Ab | Alabamine | 85 | Discredited claim to discovery of astatine. | [7] |
Am | Alabamium | 85 | Discredited claim to discovery of astatine. | [7] |
An | Athenium | 99 | Proposed name for einsteinium. | [8] |
Ao | Ausonium | 93 | Discredited claim to discovery of neptunium. | [7] |
Az | Azote | 7 | Former name for nitrogen. | [6] |
Bv | Brevium | 91 | Former name for protactinium. | [6] |
Bz | Berzelium | 59 | Suggested name for praseodymium. | [8] |
Cb | Columbium | 41 | Former name of niobium. | [6] |
Cb | Columbium | 95 | Suggested name for americium. | [8] |
Cp | Cassiopeium | 71 | Former name for lutetium. | [6] |
Ct | Centurium | 100 | Proposed name for fermium. | [8] |
Ct | Celtium | 72 | Former name of hafnium. | [6] |
Da | Danubium | 43 | Suggested name for technetium. | [8] |
Db | Dubnium | 104 | Proposed name for rutherfordium. The symbol and name were used for element 105. | [6][8] |
Eb | Ekaboron | 21 | Name given by Mendeleev to an as of then undiscovered element. When discovered, scandium closely matched the prediction. | [8][9] |
El | Ekaaluminium | 31 | Name given by Mendeleev to an as of then undiscovered element. When discovered, gallium closely matched the prediction. | [8][9] |
Em | Emanation | 86 | Also called radium emanation, the name was originally given by Friedrich Ernst Dorn in 1900. In 1923, this element officially became radon (the name given at one time to 222Rn, an isotope identified in the decay chain of radium). | [6] |
Em | Ekamangan | 43 | Name given by Mendeleev to an as of then undiscovered element. When discovered, technetium closely matched the prediction. | [8][9] |
Es | Ekasilicon | 32 | Name given by Mendeleev to an as of then undiscovered element. When discovered, germanium closely matched the prediction. | [8][9] |
Es | Esperium | 94 | Discredited claim to discovery of plutonium. | [7] |
Fa | Francium | 87 | Current symbol is Fr. | [6] |
Fr | Florentium | 61 | Discredited claim to discovery of promethium. | [7] |
Gl | Glucinium | 4 | Former name of beryllium. | [6] |
Ha | Hahnium | 105 | Proposed name for dubnium. | [8] |
Ha | Hahnium | 108 | Proposed name for hassium. | [8] |
Il | Illinium | 61 | Discredited claim to discovery of promethium. | [7] |
Jg | Jargonium | 72 | Discredited claim to discovery of hafnium. | [7] |
Jo | Joliotium | 105 | Proposed name for dubnium. | [8] |
Ku | Kurchatovium | 104 | Proposed name for rutherfordium. | [8] |
Lw | Lawrencium | 103 | Current symbol is Lr. | [6] |
M | Muriaticum | 17 | Former name of chlorine. | [6] |
Ma | Masurium | 43 | Disputed claim to discovery of technetium. | [7] |
Md | Mendelevium | 97 | Proposed name for berkelium. The symbol and name were later used for element 101. | [6][8] |
Me | Mendelevium | 68 | Suggested name for erbium. | [6] |
Ms | Masrium | 49 | Discredited claim of discovery of indium. | [7] |
Mt | Meitnium | 91 | Suggested name for protactinium. | [8] |
Mv | Mendelevium | 101 | Current symbol is Md. | [6] |
Ng | Norwegium | 72 | Discredited claim to discovery of hafnium. | [7] |
Ni | Niton | 86 | Former name for radon. | [6] |
No | Norium | 72 | Discredited claim to discovery of hafnium. | [7] |
Ns | Nielsbohrium | 105 | Proposed name for dubnium. | [8] |
Ns | Nielsbohrium | 107 | Proposed name for bohrium. | [8] |
Nt | Niton | 86 | Suggested name for radon. | [8] |
Ny | Neoytterbium | 70 | Former name of ytterbium. | [6] |
Od | Odinium | 62 | Suggested name for samarium. | [8] |
Pe | Pelopium | 41 | Former name for niobium. | [6] |
Po | Potassium | 19 | Current symbol is K. | [6] |
Rf | Rutherfordium | 106 | Proposed name for seaborgium. The symbol and name were instead used for element 104. | [6][8] |
Sa | Samarium | 62 | Current symbol is Sm. | [6] |
So | සෝඩියම් | 11 | Current symbol is Na. | [6] |
Sp | Spectrium | 70 | Suggested name for ytterbium. | [8] |
St | Antimony | 51 | Current symbol is Sb. | [6] |
Tn | Tungsten | 74 | Current symbol is W. | [6] |
Tu | Thulium | 69 | Current symbol is Tm. | [6] |
Tu | Tungsten | 74 | Current symbol is W. | [6] |
Ty | Tyrium | 60 | Suggested name for neodymium. | [8] |
Unb | Unnilbium | 102 | Temporary name given to nobelium until it was permanently named by IUPAC. | [9] |
Une | Unnilennium | 109 | Temporary name given to meitnerium until it was permanently named by IUPAC. | [9] |
Unh | Unnilhexium | 106 | Temporary name given to seaborgium until it was permanently named by IUPAC. | [9] |
Uno | Unniloctium | 108 | Temporary name given to hassium until it was permanently named by IUPAC. | [9] |
Unp | Unnilpentium | 105 | Temporary name given to dubnium until it was permanently named by IUPAC. | [9] |
Unq | Unnilquadium | 104 | Temporary name given to rutherfordium until it was permanently named by IUPAC. | [9] |
Uns | Unnilseptium | 107 | Temporary name given to bohrium until it was permanently named by IUPAC. | [9] |
Unt | Unniltrium | 103 | Temporary name given to lawrencium until it was permanently named by IUPAC. | [9] |
Unu | Unnilunium | 101 | Temporary name given to mendelevium until it was permanently named by IUPAC. | [9] |
Uub | Ununbium | 112 | Temporary name given to copernicium until it was permanently named by IUPAC. | [9] |
Uun | Ununnilium | 110 | Temporary name given to darmstadtium until it was permanently named by IUPAC. | [9] |
Uuu | Unununium | 111 | Temporary name given to roentgenium until it was permanently named by IUPAC. | [9] |
Vi | Virginium | 87 | Discredited claim to discovery of francium. | [7] |
Vm | Virginium | 87 | Discredited claim to discovery of francium. | [7] |
Yt | Yttrium | 39 | Current symbol is Y. | [6] |
The following is a list of pictographic symbols employed to symbolize elements known since ancient times (for example to the alchemists). Not included in this list are symbolic representations of substances previously called elements (such as certain rare earth mineral blends and the classical elements fire and water of ancient philosophy) which are known today to be multi-atomic. Also not included are symbolic representations currently used for elements in other languages such as the Traditional Chinese elements. Modern alphabetic notation was introduced in 1814 by Jöns Jakob Berzelius.
Chemical symbol | Original name | Modern name | Atomic number | Origin of symbol | Why Not Used |
---|---|---|---|---|---|
![]() | Hydrogen | Hydrogen | 1 | Daltonian symbol circa 1808. | [6] |
![]() | Sulfur | Sulfur | 16 | Alchemical symbol. | [6] |
![]() | Pallas | Sulfur | 16 | Alchemical symbol. | [6] |
![]() | Sulfur | Sulfur | 16 | Daltonian symbol circa 1808. | [6] |
⊛ | Magnesium | Magnesium | 21 | Alchemical symbol. | [6] |
♂ | Mars | Iron | 26 | Alchemical symbol. | [6] |
![]() | Stellae Fixae | තඹ | 29 | Pre-16th century alchemical symbol. | [6] |
♀ | Venus | තඹ | 29 | Alchemical symbol. | [6] |
![]() | Copper | තඹ | 29 | Alchemical symbol. | [6] |
© | Copper | තඹ | 29 | Daltonian symbol circa 1808. | [6] |
![]() | Arsenic | Arsenic | 33 | Alchemical symbol. | [6] |
☽ | Luna | Silver | 47 | Alchemical symbol. | [6] |
![]() | Iupiter | Tin | 50 | Alchemical symbol. | [6] |
♁ | Antimony | Antimony | 51 | Alchemical symbol. | [6] |
☉☾ | Platinum | Platinum | 78 | Alchemical symbol. | [6] |
![]() | Uranus | Platinum | 78 | Alchemical symbol. | [6] |
☼ | Sol | Gold | 79 | Alchemical symbol from the 16th century | [6] |
![]() | Sol | Gold | 79 | Alchemical symbol from 1700 through 1783. | [6] |
Pisces | Mercury | 80 | Pre-16th century alchemical symbol. | [6] | |
![]() | Neptunus | Mercury | 80 | Alchemical symbol from the 17th century. | [6] |
![]() | Mercurius | Mercury | 80 | Alchemical symbol from 1700 through 1783. | [6] |
![]() | Saturnus | Lead | 82 | Alchemical symbol circa 1783. | [6] |
![]() | Taurus | Bismuth | 83 | Alchemical symbol. | [6] |
The following is a list of isotopes of elements given in the previous tables which have been designated unique symbols. By this it is meant that a comprehensive list of current systematic symbols (in the uAtom form) are not included in the list and can instead be found in the Index to isotope pages chart. Some of the following symbols are no longer in use within the scientific community, however others (most notably some of the named isotopes of hydrogen) continue to be used today. Many of these symbols were designated during the early years of radiochemistry, and several isotopes (namely those in the actinium decay family, the radium decay family, and the thorium decay family) bear placeholder names using the early naming system devised by Ernest Rutherford. Although it is not an isotope, this is perhaps the most useful place to mention that H is the proposed symbol for the only created anti-element, antihydrogen.
Chemical Symbol | Name | Atomic Number | Origin of Symbol |
---|---|---|---|
Ac | Actinium | 89 | From the Greek aktinos. Name restricted at one time to 227Ac, an isotope of actinium. This named isotope later became the official name for element 89. |
AcA | Actinium A | 84 | From actinium and A. Placeholder name given at one time to 215Po, an isotope of polonium identified in the decay chain of actinium. |
AcB | Actinium B | 82 | From actinium and B. Placeholder name given at one time to 211Pb, an isotope of lead identified in the decay chain of actinium. |
AcC | Actinium C | 83 | From actinium and C. Placeholder name given at one time to 211Bi, an isotope of bismuth identified in the decay chain of actinium. |
AcC' | Actinium C' | 84 | From actinium and C'. Placeholder name given at one time to 211Po, an isotope of polonium identified in the decay chain of actinium. |
AcC" | Actinium C" | 81 | From actinium and C". Placeholder name given at one time to 207Tl, an isotope of thallium identified in the decay chain of actinium. |
AcK | Actinium K | 87 | Name given at one time to 223Fr, an isotope of francium identified in the decay chain of actinium. |
AcU | Actino-Uranium | 92 | Name given at one time to 235U, an isotope of uranium. |
AcX | Actinium X | 88 | Name given at one time to 223Ra, an isotope of radium identified in the decay chain of actinium. |
An | Actinon | 86 | From actinium and emanation. Name given at one time to 219Rn, an isotope of radon identified in the decay chain of actinium. |
D | Deuterium | 1 | From the Greek deuteros. Name given to 2H. |
Io | Ionium | 90 | Name given at one time to 230Th, an isotope of thorium identified in the decay chain of uranium. |
MsTh1 | Mesothorium 1 | 88 | Name given at one time to 228Ra, an isotope of radium. |
MsTh2 | Mesothorium 2 | 89 | Name given at one time to 228Ac, an isotope of actinium. |
Pa | Protactinium | 91 | From the Greek protos and actinium. Name restricted at one time to 231Pa, an isotope of protactinium. This named isotope later became the official name for element 91. |
Ra | Radium | 88 | From the Latin radius. Name restricted at one time to 226Ra, an isotope of radium. This named isotope later became the official name for element 88. |
RaA | Radium A | 84 | From radium and A. Placeholder name given at one time to 218Po, an isotope of polonium identified in the decay chain of radium. |
RaB | Radium B | 82 | From radium and B. Placeholder name given at one time to 214Pb, an isotope of lead identified in the decay chain of radium. |
RaC | Radium C | 83 | From radium and C. Placeholder name given at one time to 214Bi, an isotope of bismuth identified in the decay chain of radium. |
RaC' | Radium C' | 84 | From radium and C'. Placeholder name given at one time to 214Po, an isotope of polonium identified in the decay chain of radium. |
RaC" | Radium C" | 81 | From radium and C". Placeholder name given at one time to 210Tl, an isotope of thallium identified in the decay chain of radium. |
RaD | Radium D | 82 | From radium and D. Placeholder name given at one time to 210Pb, an isotope of lead identified in the decay chain of radium. |
RaE | Radium E | 83 | From radium and E. Placeholder name given at one time to 210Bi, an isotope of bismuth identified in the decay chain of radium. |
RaE" | Radium E" | 81 | From radium and E". Placeholder name given at one time to 206Tl, an isotope of thallium identified in the decay chain of radium. |
RaF | Radium F | 84 | From radium and F. Placeholder name given at one time to 210Po, an isotope of polonium identified in the decay chain of radium. |
RdAc | Radioactinium | 90 | Name given at one time to 227Th, an isotope of thorium. |
RdTh | Radiothorium | 90 | Name given at one time to 228Th, an isotope of thorium. |
Rn | Radon | 86 | From radium and emanation. Name restricted at one time to 222Rn, an isotope of radon identified in the decay chain of radium. This named isotope later became the official name for element 86 in 1923. |
T | Tritium | 1 | From the Greek tritos. Name given to 3H. |
Th | Thorium | 90 | After Thor. Name restricted at one time to 232Th, an isotope of thorium. This named isotope later became the official name for element 90. |
ThA | Thorium A | 84 | From thorium and A. Placeholder name given at one time to 216Po, an isotope of polonium identified in the decay chain of thorium. |
ThB | Thorium B | 82 | From thorium and B. Placeholder name given at one time to 212Pb, an isotope of lead identified in the decay chain of thorium. |
ThC | Thorium C | 83 | From thorium and C. Placeholder name given at one time to 212Bi, an isotope of bismuth identified in the decay chain of thorium. |
ThC' | Thorium C' | 84 | From thorium and C'. Placeholder name given at one time to 212Po, an isotope of polonium identified in the decay chain of thorium. |
ThC" | Thorium C" | 81 | From thorium and C". Placeholder name given at one time to 208Tl, an isotope of thallium identified in the decay chain of thorium. |
ThX | Thorium X | 88 | Name given at one time to 224Ra, an isotope of radium identified in the decay chain of thorium. |
Tn | Thoron | 86 | From thorium and emanation. Name given at one time to 220Rn, an isotope of radon identified in the decay chain of thorium. |
UI | Uranium I | 92 | Name given at one time to 238U, an isotope of uranium. |
UII | Uranium II | 92 | Name given at one time to 234U, an isotope of uranium. |
UX1 | Uranium X1 | 90 | Name given at one time to 234Th, an isotope of thorium identified in the decay chain of uranium. |
UX2 | Uranium X2 | 91 | Name given at one time to 234Pa, an isotope of protactinium identified in the decay chain of uranium. |
UY | Uranium Y | 90 | Name given at one time to 231Th, an isotope of thorium identified in the decay chain of uranium. |
UZ | Uranium Z | 91 | Name given at one time to 234Pa, an isotope of protactinium identified in the decay chain of uranium. |
General:
From organic chemistry:
From inorganic chemistry:
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