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 . සමහරක් පැරණි සංකේත තවදුරටත් භාවිතා නොකරන අවස්ථාද පවතී.
ආවර්තිතා වගුවෙහි ඇති මූලද්රව්ය කාණ්ඩ
ලෝහ | අලෝහ | අඥාත රසායනික ගුණ | ||||||||
ක්ෂාර ලෝහ | ක්ෂාරීය පාංශු ලෝහ | අනෙකුත් අලෝහ | හැලජන | |||||||
පවත්නා සංකේත
![image](https://www.wiki-data.si-lk.nina.az/image/aHR0cHM6Ly93d3cud2lraS1kYXRhLnNpLWxrLm5pbmEuYXovaW1hZ2UvYUhSMGNITTZMeTkxY0d4dllXUXVkMmxyYVcxbFpHbGhMbTl5Wnk5M2FXdHBjR1ZrYVdFdlkyOXRiVzl1Y3k5MGFIVnRZaTg0THpnMEwxQmxjbWx2WkdsalgzUmhZbXhsTG5OMlp5OHlNakJ3ZUMxUVpYSnBiMlJwWTE5MFlXSnNaUzV6ZG1jdWNHNW4ucG5n.png)
සංකේතය | නම | සංකේතයෙහි නිරුක්තිය | කාණ්ඩය | ආවර්තය | ||
---|---|---|---|---|---|---|
Ac | from Greek | 89 | [227] | 7 | ||
Ag | Latin | 47 | 107.8682(2) | 11 | 5 | |
Al | Aluminium (Aluminum) | Latin | 13 | 26.9815386(8) | 13 | 3 |
Am | the Americas | 95 | [243] | 7 | ||
Ar | Greek | 18 | 39.948(1) | 18 | 3 | |
As | Greek | 33 | 74.92160(2) | 15 | 4 | |
At | Greek | 85 | [210] | 17 | 6 | |
Au | Gold | Latin aurum | 79 | 196.966569(4) | 11 | 6 |
B | Boron | 5 | 10.811(7) | 13 | 2 | |
Ba | Greek | 56 | 137.327(7) | 2 | 6 | |
Be | 4 | 9.012182(3) | 2 | 2 | ||
Bh | Niels Bohr | 107 | [264] | 7 | 7 | |
Bi | from German , becoming bismuth in English | 83 | 208.98040(1) | 15 | 6 | |
Bk | 97 | [247] | 7 | |||
Br | Greek | 35 | 79.904(1) | 17 | 4 | |
C | Carbon | Latin | 6 | 12.0107(8) | 14 | 2 |
Ca | කැල්සියම් | Latin | 20 | 40.078(4) | 2 | 4 |
Cd | Cadmium | from Greek | 48 | 112.411(8) | 12 | 5 |
Ce | Ceres | 58 | 140.116(1) | 6 | ||
Cf | 98 | [251] | 7 | |||
Cl | Chlorine | Greek | 17 | 35.453(2) | 17 | 3 |
Cm | and and the traditional -um ending | 96 | [247] | 7 | ||
Cn | 112 | [285] | 12 | 7 | ||
Co | from German | 27 | 58.933195(5) | 9 | 4 | |
Cr | Greek | 24 | 51.9961(6) | 6 | 4 | |
Cs | (Cesium) | Latin | 55 | 132.9054519(2) | 1 | 6 |
Cu | තඹ | Latin Cuprum | 29 | 63.546(3) | 11 | 4 |
Db | 105 | [262] | 5 | 7 | ||
Ds | 110 | [271] | 10 | 7 | ||
Dy | Greek dysprositos | 66 | 162.500(1) | 6 | ||
Er | 68 | 167.259(3) | 6 | |||
Es | Albert Einstein | 99 | [252] | 7 | ||
Eu | Europe | 63 | 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 | 100 | [257] | 7 | |||
Fr | France | 87 | [223] | 1 | 7 | |
Ga | Gallium | Latin | 31 | 69.723(1) | 13 | 4 |
Gd | 64 | 157.25(3) | 6 | |||
Ge | Germany | 32 | 72.64(1) | 14 | 4 | |
H | Hydrogen | Greek | 1 | 1.00794(7) | 1 | 1 |
He | Greek helios | 2 | 4.002602(2) | 18 | 1 | |
Hf | Latin | 72 | 178.49(2) | 4 | 6 | |
Hg | Latin hydr | 80 | 200.59(2) | 12 | 6 | |
Ho | Latin | 67 | 164.930 32(2) | 6 | ||
Hs | 108 | [277] | 8 | 7 | ||
I | Greek | 53 | 126.904 47(3) | 17 | 5 | |
In | 49 | 114.818(3) | 13 | 5 | ||
Ir | Greek | 77 | 192.217(3) | 9 | 6 | |
K | Potassium (Kalium) | Latin kalium | 19 | 39.0983(1) | 1 | 4 |
Kr | Greek kryptos | 36 | 83.798(2) | 18 | 4 | |
La | Greek lanthanien | 57 | 138.90547(7) | 6 | ||
Li | Lithium | Greek lithos | 3 | 6.941(2) | 1 | 2 |
Lr | Lawrencium | 103 | [262] | 3 | 7 | |
Lu | Latin | 71 | 174.967(1) | 3 | 6 | |
Md | 101 | [258] | 7 | |||
Mg | 12 | 24.3050(6) | 2 | 3 | ||
Mn | Manganese | Latin | 25 | 54.938045(5) | 7 | 4 |
Mo | Greek | 42 | 95.94(2) | 6 | 5 | |
Mt | 109 | [268] | 9 | 7 | ||
N | Nitrogen | Greek | 7 | 14.0067(2) | 15 | 2 |
Na | සෝඩියම් | Latin natrium | 11 | 22.98976928(2) | 1 | 3 |
Nb | 41 | 92.906 38(2) | 5 | 5 | ||
Nd | Greek neos | 60 | 144.242(3) | 6 | ||
Ne | Neon | Greek neos | 10 | 20.1797(6) | 18 | 2 |
Ni | German | 28 | 58.6934(2) | 10 | 4 | |
No | 102 | [259] | 7 | |||
Np | Neptune | 93 | [237] | 7 | ||
O | Oxygen | Greek oxys | 8 | 15.9994(3) | 16 | 2 |
Os | Greek | 76 | 190.23(3) | 8 | 6 | |
P | Phosphorus | Greek phoros | 15 | 30.973762(2) | 15 | 3 |
Pa | Greek protos and | 91 | 231.03588(2) | 7 | ||
Pb | Latin | 82 | 207.2(1) | 14 | 6 | |
Pd | (genitive Pallados) | 46 | 106.42(1) | 10 | 5 | |
Pm | 61 | [145] | 6 | |||
Po | 84 | [210] | 16 | 6 | ||
Pr | Greek | 59 | 140.90765(2) | 6 | ||
Pt | Greek | 78 | 195.084(9) | 10 | 6 | |
Pu | Pluto | 94 | [244] | 7 | ||
Ra | Latin | 88 | [226] | 2 | 7 | |
Rb | Latin | 37 | 85.4678(3) | 1 | 5 | |
Re | German | 75 | 186.207(1) | 7 | 6 | |
Rf | Ernest Rutherford | 104 | 261 | 4 | 7 | |
Rg | 111 | [272] | 11 | 7 | ||
Rh | Greek | 45 | 102.905 50(2) | 9 | 5 | |
Rn | and | 86 | [220] | 18 | 6 | |
Ru | Latin Ruthenia | 44 | 101.07(2) | 8 | 5 | |
S | (Sulphur) | Latin | 16 | 32.065(5) | 16 | 3 |
Sb | Latin | 51 | 121.760(1) | 15 | 5 | |
Sc | Scandium | 21 | 44.955912(6) | 3 | 4 | |
Se | Greek selene | 34 | 78.96(3) | 16 | 4 | |
Sg | 106 | [266] | 6 | 7 | ||
Si | Latin | 14 | 28.0855(3) | 14 | 3 | |
Sm | 62 | 150.36(2) | 6 | |||
Sn | Latin | 50 | 118.710(7) | 14 | 5 | |
Sr | Gaelic Strontian | 38 | 87.62(1) | 2 | 5 | |
Ta | King | 73 | 180.94788(2) | 5 | 6 | |
Tb | 65 | 158.92535(2) | 6 | |||
Tc | Greek technetos | 43 | [98] | 7 | 5 | |
Te | Greek tellus | 52 | 127.60(3) | 16 | 5 | |
Th | Thorium | 90 | 232.03806(2) | 7 | ||
Ti | the | 22 | 47.867(1) | 4 | 4 | |
Tl | Greek | 81 | 204.3833(2) | 13 | 6 | |
Tm | and the traditional -ium ending | 69 | 168.93421(2) | 6 | ||
U | Uranium | Uranus | 92 | 238.02891(3) | 7 | |
Uuh | Latin , , and Greek | 116 | [292] | 16 | 7 | |
Uuo | Ununoctium | Latin , , and | 118 | [294] | 18 | 7 |
Uup | Latin , , and Greek | 115 | [288] | 15 | 7 | |
Uuq | Latin , , and | 114 | [289] | 14 | 7 | |
Uus | Latin , , and Greek | 117 | [295] | 17 | 7 | |
Uut | Latin , , and Greek | 113 | [284] | 13 | 7 | |
V | 23 | 50.9415(1) | 5 | 4 | ||
W | German | 74 | 183.84(1) | 6 | 6 | |
Xe | Greek | 54 | 131.293(6) | 18 | 5 | |
Y | 39 | 88.90585(2) | 3 | 5 | ||
Yb | 70 | 173.04(3) | 6 | |||
Zn | German | 30 | 65.409(4) | 12 | 4 | |
Zr | 40 | 91.224(2) | 4 | 5 |
ආවර්තිතා වගුවෙහි ඇති මූලද්රව්ය කාණ්ඩ
ලෝහ | අලෝහ | අඥාත රසායනික ගුණ | ||||||||
ක්ෂාර ලෝහ | ක්ෂාරීය පාංශු ලෝහ | අනෙකුත් අලෝහ | හැලජන | |||||||
Symbols not currently used
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 | 18 | Current symbol is Ar. | ||
Ab | Alabamine | 85 | Discredited claim to discovery of . | |
Am | Alabamium | 85 | Discredited claim to discovery of . | |
An | Athenium | 99 | Proposed name for . | |
Ao | Ausonium | 93 | Discredited claim to discovery of . | |
Az | Azote | 7 | Former name for nitrogen. | |
Bv | Brevium | 91 | Former name for . | |
Bz | Berzelium | 59 | Suggested name for . | |
Cb | Columbium | 41 | Former name of . | |
Cb | Columbium | 95 | Suggested name for . | |
Cp | Cassiopeium | 71 | Former name for . | |
Ct | Centurium | 100 | Proposed name for . | |
Ct | Celtium | 72 | Former name of . | |
Da | Danubium | 43 | Suggested name for . | |
Db | 104 | Proposed name for . The symbol and name were used for element 105. | ||
Eb | Ekaboron | 21 | Name given by 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. | |
Em | Emanation | 86 | Also called radium emanation, the name was originally given by in 1900. In 1923, this element officially became (the name given at one time to 222Rn, an isotope identified in the decay chain of ). | |
Em | Ekamangan | 43 | Name given by Mendeleev to an as of then undiscovered element. When discovered, closely matched the prediction. | |
Es | Ekasilicon | 32 | Name given by Mendeleev to an as of then undiscovered element. When discovered, closely matched the prediction. | |
Es | Esperium | 94 | Discredited claim to discovery of . | |
Fa | 87 | Current symbol is Fr. | ||
Fr | Florentium | 61 | Discredited claim to discovery of . | |
Gl | Glucinium | 4 | Former name of . | |
Ha | Hahnium | 105 | Proposed name for . | |
Ha | Hahnium | 108 | Proposed name for . | |
Il | Illinium | 61 | Discredited claim to discovery of . | |
Jg | Jargonium | 72 | Discredited claim to discovery of . | |
Jo | Joliotium | 105 | Proposed name for . | |
Ku | Kurchatovium | 104 | Proposed name for . | |
Lw | Lawrencium | 103 | Current symbol is Lr. | |
M | Muriaticum | 17 | Former name of chlorine. | |
Ma | Masurium | 43 | Disputed claim to discovery of . | |
Md | 97 | Proposed name for . The symbol and name were later used for element 101. | ||
Me | Mendelevium | 68 | Suggested name for . | |
Ms | Masrium | 49 | Discredited claim of discovery of . | |
Mt | Meitnium | 91 | Suggested name for . | |
Mv | 101 | Current symbol is Md. | ||
Ng | Norwegium | 72 | Discredited claim to discovery of . | |
Ni | Niton | 86 | Former name for . | |
No | Norium | 72 | Discredited claim to discovery of . | |
Ns | Nielsbohrium | 105 | Proposed name for . | |
Ns | Nielsbohrium | 107 | Proposed name for . | |
Nt | Niton | 86 | Suggested name for . | |
Ny | Neoytterbium | 70 | Former name of . | |
Od | Odinium | 62 | Suggested name for . | |
Pe | Pelopium | 41 | Former name for . | |
Po | Potassium | 19 | Current symbol is K. | |
Rf | 106 | Proposed name for . The symbol and name were instead used for element 104. | ||
Sa | 62 | Current symbol is Sm. | ||
So | සෝඩියම් | 11 | Current symbol is Na. | |
Sp | Spectrium | 70 | Suggested name for . | |
St | 51 | Current symbol is Sb. | ||
Tn | 74 | Current symbol is W. | ||
Tu | 69 | Current symbol is Tm. | ||
Tu | Tungsten | 74 | Current symbol is W. | |
Ty | Tyrium | 60 | Suggested name for . | |
Unb | Unnilbium | 102 | Temporary name given to until it was permanently named by IUPAC. | |
Une | Unnilennium | 109 | Temporary name given to until it was permanently named by IUPAC. | |
Unh | Unnilhexium | 106 | Temporary name given to until it was permanently named by IUPAC. | |
Uno | Unniloctium | 108 | Temporary name given to until it was permanently named by IUPAC. | |
Unp | Unnilpentium | 105 | Temporary name given to until it was permanently named by IUPAC. | |
Unq | Unnilquadium | 104 | Temporary name given to until it was permanently named by IUPAC. | |
Uns | Unnilseptium | 107 | Temporary name given to until it was permanently named by IUPAC. | |
Unt | Unniltrium | 103 | Temporary name given to lawrencium until it was permanently named by IUPAC. | |
Unu | Unnilunium | 101 | Temporary name given to until it was permanently named by IUPAC. | |
Uub | Ununbium | 112 | Temporary name given to until it was permanently named by IUPAC. | |
Uun | Ununnilium | 110 | Temporary name given to until it was permanently named by IUPAC. | |
Uuu | Unununium | 111 | Temporary name given to until it was permanently named by IUPAC. | |
Vi | Virginium | 87 | Discredited claim to discovery of . | |
Vm | Virginium | 87 | Discredited claim to discovery of . | |
Yt | 39 | Current symbol is Y. |
Pictographic symbols
The following is a list of pictographic symbols employed to symbolize elements known since ancient times (for example to the ). Not included in this list are symbolic representations of substances previously called elements (such as certain mineral blends and the and 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 . Modern alphabetic notation was introduced in 1814 by .
Chemical symbol | Original name | Modern name | Atomic number | Origin of symbol | Why Not Used |
---|---|---|---|---|---|
![]() | Hydrogen | 1 | symbol circa 1808. | ||
![]() | 16 | symbol. | |||
![]() | 16 | symbol. | |||
![]() | 16 | symbol circa 1808. | |||
⊛ | 21 | symbol. | |||
♂ | Iron | 26 | symbol. | ||
![]() | තඹ | 29 | Pre-16th century symbol. | ||
♀ | තඹ | 29 | symbol. | ||
![]() | තඹ | 29 | symbol. | ||
© | තඹ | 29 | symbol circa 1808. | ||
![]() | 33 | symbol. | |||
☽ | 47 | symbol. | |||
![]() | 50 | symbol. | |||
♁ | 51 | symbol. | |||
☉☾ | 78 | symbol. | |||
![]() | 78 | symbol. | |||
☼ | Gold | 79 | symbol from the 16th century | ||
![]() | Gold | 79 | symbol from 1700 through 1783. | ||
80 | Pre-16th century symbol. | ||||
![]() | 80 | symbol from the 17th century. | |||
![]() | 80 | symbol from 1700 through 1783. | |||
![]() | 82 | symbol circa 1783. | |||
![]() | 83 | symbol. |
Symbols for named isotopes
The following is a 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 chart. Some of the following symbols are no longer in use within the scientific community, however others (most notably some of the named ) continue to be used today. Many of these symbols were designated during the early years of , and several isotopes (namely those in the decay family, the 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, .
Chemical Symbol | Name | Atomic Number | Origin of Symbol |
---|---|---|---|
Ac | 89 | From the Greek . Name restricted at one time to 227Ac, an isotope of . This named isotope later became the official name for . | |
AcA | Actinium A | 84 | From and . Placeholder name given at one time to 215Po, an isotope of identified in the decay chain of . |
AcB | Actinium B | 82 | From and B. Placeholder name given at one time to 211Pb, an isotope of identified in the decay chain of . |
AcC | Actinium C | 83 | From and C. Placeholder name given at one time to 211Bi, an isotope of identified in the decay chain of . |
AcC' | Actinium C' | 84 | From and C. Placeholder name given at one time to 211Po, an isotope of identified in the decay chain of . |
AcC" | Actinium C" | 81 | From and C. Placeholder name given at one time to 207Tl, an isotope of identified in the decay chain of . |
AcK | Actinium K | 87 | Name given at one time to 223Fr, an isotope of identified in the decay chain of . |
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 identified in the decay chain of . |
An | 86 | From and . Name given at one time to 219Rn, an isotope of identified in the decay chain of . | |
D | Deuterium | 1 | From the Greek . Name given to 2H. |
Io | 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 . |
MsTh2 | Mesothorium 2 | 89 | Name given at one time to 228Ac, an isotope of . |
Pa | 91 | From the Greek protos and . Name restricted at one time to 231Pa, an isotope of . This named isotope later became the official name for . | |
Ra | 88 | From the Latin . Name restricted at one time to 226Ra, an isotope of . This named isotope later became the official name for . | |
RaA | 84 | From and . Placeholder name given at one time to 218Po, an isotope of identified in the decay chain of . | |
RaB | Radium B | 82 | From and B. Placeholder name given at one time to 214Pb, an isotope of identified in the decay chain of . |
RaC | Radium C | 83 | From and C. Placeholder name given at one time to 214Bi, an isotope of identified in the decay chain of . |
RaC' | Radium C' | 84 | From and C. Placeholder name given at one time to 214Po, an isotope of identified in the decay chain of . |
RaC" | Radium C" | 81 | From and C. Placeholder name given at one time to 210Tl, an isotope of identified in the decay chain of . |
RaD | Radium D | 82 | From and . Placeholder name given at one time to 210Pb, an isotope of identified in the decay chain of . |
RaE | Radium E | 83 | From and . Placeholder name given at one time to 210Bi, an isotope of identified in the decay chain of . |
RaE" | Radium E" | 81 | From and . Placeholder name given at one time to 206Tl, an isotope of identified in the decay chain of . |
RaF | 84 | From and F. Placeholder name given at one time to 210Po, an isotope of identified in the decay chain of . | |
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 | 86 | From and . Name restricted at one time to 222Rn, an isotope of identified in the decay chain of . This named isotope later became the official name for in 1923. | |
T | Tritium | 1 | From the Greek . Name given to 3H. |
Th | Thorium | 90 | After . 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 . Placeholder name given at one time to 216Po, an isotope of 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 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 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 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 identified in the decay chain of thorium. |
ThX | Thorium X | 88 | Name given at one time to 224Ra, an isotope of identified in the decay chain of thorium. |
Tn | 86 | From thorium and . Name given at one time to 220Rn, an isotope of identified in the decay chain of thorium. | |
UI | 92 | Name given at one time to 238U, an isotope of uranium. | |
UII | 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 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 identified in the decay chain of uranium. |
Other symbols that look like element symbols
General:
- E: any element
- M: metal - any metal atom
- Mu:
- Ps:
- X: - any halogen atom
From organic chemistry:
- Ac: - (also used for the element : see above)
- Ar: - (also used for the element : see above)
- Bn:
- Bu:
- Bz: or - (also used for , an old suggested name for ).
- Cp:
- Cy:
- Et:
- Me:
- Ms: (methylsulfonyl)
- Ph:
- Pr: - (also used for the element : see above)
- R: - some unspecified element or
- Tf: (trifluoromethanesulfonyl)
- Tr: (triphenylmethyl)
- Ts:
From inorganic chemistry:
- Ab:
- Di: - Rare earth metal that proved to be a mixture of the elements and .
- Dp: - Rare earth metal that proved to be a mixture of the elements , and .
- Pp: - rare earth metal that proved to be a mixture of the elements and .
Notes
- The element does not have any stable nuclides, and a value in brackets, e.g. [209], indicates the mass number of the longest-lived isotope of the element. However, three elements, thorium, protactinium, and uranium, have a characteristic terrestrial isotopic composition, and thus their atomic mass given.
- The isotopic composition of this element varies in some geological specimens, and the variation may exceed the uncertainty stated in the table.
- The isotopic composition varies in terrestrial material such that a more precise atomic weight can not be given.
- The isotopic composition of the element can vary in commercial materials, which can cause the atomic weight to deviate significantly from the given value.
- The atomic weight of commercial Lithium can vary between 6.939 and 6.996—analysis of the specific material is necessary to find a more accurate value.
- Name changed due to a standardization of, modernization of, or update to older formerly-used symbol.
- Name designated by discredited/disputed claimant.
- Name proposed prior to discovery/creation of element or prior to official re-naming of a placeholder name.
- Temporary placeholder name.
References
- Element name etymologies. Retrieved July 15, 2005.
- Atomic Weights of the Elements 2001, Pure Appl. Chem. 75(8), 1107-1122, 2003. Retrieved June 30, 2005. Atomic weights of elements with atomic numbers from 1-109 taken from this source.
- IUPAC Standard Atomic Weights Revised 2008-03-05 at the Wayback Machine (2005).
- WebElements Periodic Table. Retrieved June 30, 2005. Atomic weights of elements with atomic numbers 110-116 taken from this source.
- Lapp, Ralph E. Matter. Life Science Library. New York: Time Incorporated. 1963.
- Leighton, Robert B. Principles of Modern Physics. New York: McGraw-Hill. 1959.
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