Attached subscripts or superscripts specifying a nucleotide or molecule have the following meanings and positions:
Symbol
|
Name
|
Etymology of symbol
|
Atomic number
|
Relative atomic mass
|
Group
|
Period
|
Metallic character
|
Ac |
Actinium |
from Greek aktinos (ray) |
89 |
&227[227][nb 1] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
Ag |
Silver |
Latin argentum (silver) |
47 |
&107.86822107.8682(2)[nb 2] |
11 |
5
|
style="background-color:Template:Element color" | Transition metal
|
Al |
Aluminium (Aluminum) |
Latin alumen (alum) |
13 |
&026.9815386826.9815386(8) |
13 |
3
|
style="background-color:Template:Element color" | Poor metal
|
Am |
Americium |
the Americas |
95 |
&243[243][nb 1] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
Ar |
Argon |
Greek argon (inert) |
18 |
&039.948139.948(1)[nb 2][nb 3] |
18 |
3
|
style="background-color:Template:Element color" | Noble gas
|
As |
Arsenic |
Greek arsenikos (male) |
33 |
&074.92160274.92160(2) |
15 |
4
|
style="background-color:Template:Element color" | Metalloid
|
At |
Astatine |
Greek astatos (unstable) |
85 |
&210[210][nb 1] |
17 |
6
|
style="background-color:Template:Element color" | Metalloid
|
Au |
Gold |
Latin aurum (gold) |
79 |
&196.9665694196.966569(4) |
11 |
6
|
style="background-color:Template:Element color" | Transition metal
|
B |
Boron |
borax |
5 |
&010.811710.811(7)[nb 2][nb 3][nb 4] |
13 |
2
|
style="background-color:Template:Element color" | Metalloid
|
Ba |
Barium |
Greek barys (density) |
56 |
&137.3277137.327(7) |
2 |
6
|
style="background-color:Template:Element color" | Alkaline earth metal
|
Be |
Beryllium |
beryl |
4 |
&009.01218239.012182(3) |
2 |
2
|
style="background-color:Template:Element color" | Alkaline earth metal
|
Bh |
Bohrium |
Niels Bohr |
107 |
&264[264][nb 1] |
7 |
7
|
style="background-color:Template:Element color" | Transition metal
|
Bi |
Bismuth |
from German wiss muth (white-mass), becoming bismuth in English |
83 |
&208.980401208.98040(1) |
15 |
6
|
style="background-color:Template:Element color" | Poor metal
|
Bk |
Berkelium |
Berkeley, California |
97 |
&247[247][nb 1] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
Br |
Bromine |
Greek bromos (stench) |
35 |
&079.904179.904(1) |
17 |
4
|
style="background-color:Template:Element color" | Diatomic nonmetal
|
C |
Carbon |
Latin carbo (charcoal) |
6 |
&012.0107812.0107(8)[nb 2][nb 3] |
14 |
2
|
style="background-color:Template:Element color" | Polyatomic nonmetal
|
Ca |
Calcium |
Latin calx (lime) |
20 |
&040.078440.078(4)[nb 2] |
2 |
4
|
style="background-color:Template:Element color" | Alkaline earth metal
|
Cd |
Cadmium |
Greek kadmia (earth) |
48 |
&112.4118112.411(8)[nb 2] |
12 |
5
|
style="background-color:Template:Element color" | Transition metal
|
Ce |
Cerium |
Ceres |
58 |
&140.1161140.116(1)[nb 2] |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
Cf |
Californium |
State and University of California |
98 |
&251[251][nb 1] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
Cl |
Chlorine |
Greek chloros (green-yellow) |
17 |
&035.453235.453(2)[nb 2][nb 3][nb 4] |
17 |
3
|
style="background-color:Template:Element color" | Diatomic nonmetal
|
Cm |
Curium |
Pierre and Marie Curie and the traditional -um ending |
96 |
&247[247][nb 1] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
Cn |
Copernicium |
Nicolaus Copernicus |
112 |
&285[285][nb 1] |
12 |
7
|
style="background-color:Template:Element color" | Transition metal
|
Co |
Cobalt |
from German kobold |
27 |
&058.933195558.933195(5) |
9 |
4
|
style="background-color:Template:Element color" | Transition metal
|
Cr |
Chromium |
Greek chroma (color) |
24 |
&051.9961651.9961(6) |
6 |
4
|
style="background-color:Template:Element color" | Transition metal
|
Cs |
Caesium (Cesium) |
Latin caesius (sky blue) |
55 |
&132.90545192132.9054519(2) |
1 |
6
|
style="background-color:Template:Element color" | Alkali metal
|
Cu |
Copper |
Latin Cuprum (Cyprus) |
29 |
&063.546363.546(3)[nb 3] |
11 |
4
|
style="background-color:Template:Element color" | Transition metal
|
Db |
Dubnium |
Dubna, Russia |
105 |
&262[262][nb 1] |
5 |
7
|
style="background-color:Template:Element color" | Transition metal
|
Ds |
Darmstadtium |
Darmstadt, Germany |
110 |
&271[271][nb 1] |
10 |
7
|
style="background-color:Template:Element color" | Unknown
|
Dy |
Dysprosium |
Greek dysprositos |
66 |
&162.5001162.500(1)[nb 2] |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
Er |
Erbium |
Ytterby, Sweden |
68 |
&167.2593167.259(3)[nb 2] |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
Es |
Einsteinium |
Albert Einstein |
99 |
&252[252][nb 1] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
Eu |
Europium |
Europe |
63 |
&151.9641151.964(1)[nb 2] |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
F |
Fluorine |
Latin fluo (flow) |
9 |
&018.9984032518.9984032(5) |
17 |
2
|
style="background-color:Template:Element color" | Diatomic nonmetal
|
Fe |
Iron |
Latin ferrum (iron) |
26 |
&055.845255.845(2) |
8 |
4
|
style="background-color:Template:Element color" | Transition metal
|
Fl |
Flerovium |
Flerov Laboratory of Nuclear Reactions |
114 |
&289[289][nb 1] |
14 |
7 |
style="background-color:Template:Element color" | Unknown
|
Fm |
Fermium |
Enrico Fermi |
100 |
&257[257][nb 1] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
Fr |
Francium |
France |
87 |
&223[223][nb 1] |
1 |
7
|
style="background-color:Template:Element color" | Alkali metal
|
Ga |
Gallium |
Latin Gallia (Gaul) |
31 |
&069.723169.723(1) |
13 |
4
|
style="background-color:Template:Element color" | Poor metal
|
Gd |
Gadolinium |
gadolinite |
64 |
&157.253157.25(3)[nb 2] |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
Ge |
Germanium |
Germany |
32 |
&072.64172.64(1) |
14 |
4
|
style="background-color:Template:Element color" | Metalloid
|
H |
Hydrogen |
Greek hydor gennao (liquid-produce) |
1 |
&001.0079471.00794(7)[nb 2][nb 3][nb 4] |
1 |
1
|
style="background-color:Template:Element color" | Diatomic nonmetal
|
He |
Helium |
Greek helios (Sun) |
2 |
&004.00260224.002602(2)[nb 2][nb 3] |
18 |
1
|
style="background-color:Template:Element color" | Noble gas
|
Hf |
Hafnium |
Latin Hafnia (Copenhagen) |
72 |
&178.492178.49(2) |
4 |
6
|
style="background-color:Template:Element color" | Transition metal
|
Hg |
Mercury |
Greek hydrargyrum (liquid silver) |
80 |
&200.592200.59(2) |
12 |
6
|
style="background-color:Template:Element color" | Transition metal
|
Ho |
Holmium |
Latin Holmia (Stockholm) |
67 |
&164.930322164.930 32(2) |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
Hs |
Hassium |
Hesse, Germany |
108 |
&277[277][nb 1] |
8 |
7
|
style="background-color:Template:Element color" | Transition metal
|
I |
Iodine |
Greek ioeides (violet) |
53 |
&126.904473126.904 47(3) |
17 |
5
|
style="background-color:Template:Element color" | Diatomic nonmetal
|
In |
Indium |
indigo blue |
49 |
&114.8183114.818(3) |
13 |
5
|
style="background-color:Template:Element color" | Poor metal
|
Ir |
Iridium |
Greek iris (rainbow) |
77 |
&192.2173192.217(3) |
9 |
6
|
style="background-color:Template:Element color" | Transition metal
|
K |
Potassium |
Latin kalium (potassium) |
19 |
&039.0983139.0983(1) |
1 |
4
|
style="background-color:Template:Element color" | Alkali metal
|
Kr |
Krypton |
Greek kryptos (concealment) |
36 |
&083.798283.798(2)[nb 2][nb 4] |
18 |
4
|
style="background-color:Template:Element color" | Noble gas
|
La |
Lanthanum |
Greek lanthano (escape) |
57 |
&138.905477138.90547(7)[nb 2] |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
Li |
Lithium |
Greek lithos (rock) |
3 |
&006.94126.941(2)[nb 2][nb 3][nb 4][nb 5] |
1 |
2
|
style="background-color:Template:Element color" | Alkali metal
|
Lr |
Lawrencium |
Ernest O. Lawrence |
103 |
&262[262][nb 1] |
3 |
7
|
style="background-color:Template:Element color" | Actinide
|
Lu |
Lutetium |
Latin Lutetia (Paris) |
71 |
&174.9671174.967(1)[nb 2] |
3 |
6
|
style="background-color:Template:Element color" | Lanthanide
|
Lv |
Livermorium |
Lawrence Livermore National Laboratory |
116 |
&292[292][nb 1] |
16 |
7
|
style="background-color:Template:Element color" | Unknown
|
Md |
Mendelevium |
Dmitri Mendeleyev |
101 |
&258[258][nb 1] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
Mg |
Magnesium |
Magnesia, Greece |
12 |
&024.3050624.3050(6) |
2 |
3
|
style="background-color:Template:Element color" | Alkaline earth metal
|
Mn |
Manganese |
Greek magnes (magnet) |
25 |
&054.938045554.938045(5) |
7 |
4
|
style="background-color:Template:Element color" | Transition metal
|
Mo |
Molybdenum |
Greek molybdos (lead) |
42 |
&095.94295.94(2)[nb 2] |
6 |
5
|
style="background-color:Template:Element color" | Transition metal
|
Mt |
Meitnerium |
Lise Meitner |
109 |
&268[268][nb 1] |
9 |
7
|
style="background-color:Template:Element color" | Unknown
|
N |
Nitrogen |
Greek nitron (niter) |
7 |
&014.0067214.0067(2)[nb 2][nb 3] |
15 |
2
|
style="background-color:Template:Element color" | Diatomic nonmetal
|
Na |
Sodium |
Latin natrium (sodium) |
11 |
&022.98976928222.98976928(2) |
1 |
3
|
style="background-color:Template:Element color" | Alkali metal
|
Nb |
Niobium |
Niobe |
41 |
&092.90638292.906 38(2) |
5 |
5
|
style="background-color:Template:Element color" | Transition metal
|
Nd |
Neodymium |
Greek neos didymos (novelty-twin) |
60 |
&144.2423144.242(3)[nb 2] |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
Ne |
Neon |
Greek neos (novelty) |
10 |
&020.1797620.1797(6)[nb 2][nb 4] |
18 |
2
|
style="background-color:Template:Element color" | Noble gas
|
Ni |
Nickel |
German kupfernickel (nickeline) |
28 |
&058.6934258.6934(2) |
10 |
4
|
style="background-color:Template:Element color" | Transition metal
|
No |
Nobelium |
Alfred Nobel |
102 |
&259[259][nb 1] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
Np |
Neptunium |
Neptune |
93 |
&237[237][nb 1] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
O |
Oxygen |
Greek oxys (acid) |
8 |
&015.9994315.9994(3)[nb 2][nb 3] |
16 |
2
|
style="background-color:Template:Element color" | Diatomic nonmetal
|
Os |
Osmium |
Greek osme (odor) |
76 |
&190.233190.23(3)[nb 2] |
8 |
6
|
style="background-color:Template:Element color" | Transition metal
|
P |
Phosphorus |
Greek phosphoros (light bearer) |
15 |
&030.973762230.973762(2) |
15 |
3
|
style="background-color:Template:Element color" | Polyatomic nonmetal
|
Pa |
Protactinium |
Greek protos and actinium |
91 |
&231.035882231.03588(2)[nb 1] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
Pb |
Lead |
Latin plumbum (lead) |
82 |
&207.21207.2(1)[nb 2][nb 3] |
14 |
6
|
style="background-color:Template:Element color" | Poor metal
|
Pd |
Palladium |
Pallas (genitive Pallados) |
46 |
&106.421106.42(1)[nb 2] |
10 |
5
|
style="background-color:Template:Element color" | Transition metal
|
Pm |
Promethium |
Prometheus |
61 |
&145[145][nb 1] |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
Po |
Polonium |
Poland |
84 |
&210[210][nb 1] |
16 |
6
|
style="background-color:Template:Element color" | Poor metal
|
Pr |
Praseodymium |
Greek prasios (green) |
59 |
&140.907652140.90765(2) |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
Pt |
Platinum |
Spanish platina (silver) |
78 |
&195.0849195.084(9) |
10 |
6
|
style="background-color:Template:Element color" | Transition metal
|
Pu |
Plutonium |
Pluto |
94 |
&244[244][nb 1] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
Ra |
Radium |
Latin radius (ray) |
88 |
&226[226][nb 1] |
2 |
7
|
style="background-color:Template:Element color" | Alkaline earth metal
|
Rb |
Rubidium |
Latin rubidus (red) |
37 |
&085.4678385.4678(3)[nb 2] |
1 |
5
|
style="background-color:Template:Element color" | Alkali metal
|
Re |
Rhenium |
German Rheinprovinz |
75 |
&186.2071186.207(1) |
7 |
6
|
style="background-color:Template:Element color" | Transition metal
|
Rf |
Rutherfordium |
Ernest Rutherford |
104 |
&261261[nb 1] |
4 |
7
|
style="background-color:Template:Element color" | Transition metal
|
Rg |
Roentgenium |
Wilhelm Conrad Röntgen |
111 |
&272[272][nb 1] |
11 |
7
|
style="background-color:Template:Element color" | Unknown
|
Rh |
Rhodium |
Greek rhodon (rose) |
45 |
&102.905502102.905 50(2) |
9 |
5
|
style="background-color:Template:Element color" | Transition metal
|
Rn |
Radon |
radium and emanation |
86 |
&220[220][nb 1] |
18 |
6
|
style="background-color:Template:Element color" | Noble gas
|
Ru |
Ruthenium |
Latin Ruthenia (Russia) |
44 |
&101.072101.07(2)[nb 2] |
8 |
5
|
style="background-color:Template:Element color" | Transition metal
|
S |
Sulfur (Sulphur) |
Latin sulfur |
16 |
&032.065532.065(5)[nb 2][nb 3] |
16 |
3
|
style="background-color:Template:Element color" | Polyatomic nonmetal
|
Sb |
Antimony |
Latin stibium (eye liner) |
51 |
&121.7601121.760(1)[nb 2] |
15 |
5
|
style="background-color:Template:Element color" | Metalloid
|
Sc |
Scandium |
Scandinavia |
21 |
&044.955912644.955912(6) |
3 |
4
|
style="background-color:Template:Element color" | Transition metal
|
Se |
Selenium |
Greek selene (Moon) |
34 |
&078.96378.96(3)[nb 3] |
16 |
4
|
style="background-color:Template:Element color" | Polyatomic nonmetal
|
Sg |
Seaborgium |
Glenn T. Seaborg |
106 |
&266[266][nb 1] |
6 |
7
|
style="background-color:Template:Element color" | Transition metal
|
Si |
Silicon |
Latin silex (flint) |
14 |
&028.0855328.0855(3)[nb 3] |
14 |
3
|
style="background-color:Template:Element color" | Metalloid
|
Sm |
Samarium |
samarskite |
62 |
&150.362150.36(2)[nb 2] |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
Sn |
Tin |
Latin stannum (tin) |
50 |
&118.7101118.710(7)[nb 2] |
14 |
5
|
style="background-color:Template:Element color" | Poor metal
|
Sr |
Strontium |
Strontian |
38 |
&087.62187.62(1)[nb 2][nb 3] |
2 |
5
|
style="background-color:Template:Element color" | Alkaline earth metal
|
Ta |
Tantalum |
King Tantalus |
73 |
&180.947882180.94788(2) |
5 |
6
|
style="background-color:Template:Element color" | Transition metal
|
Tb |
Terbium |
Ytterby, Sweden |
65 |
&158.925352158.92535(2) |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
Tc |
Technetium |
Greek technetos (artificial) |
43 |
&098[98][nb 1] |
7 |
5
|
style="background-color:Template:Element color" | Transition metal
|
Te |
Tellurium |
Greek tellus (Earth) |
52 |
&127.603127.60(3)[nb 2] |
16 |
5
|
style="background-color:Template:Element color" | Metalloid
|
Th |
Thorium |
Thor |
90 |
&232.038062232.03806(2)[nb 1][nb 2] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
Ti |
Titanium |
the Titans |
22 |
&047.867147.867(1) |
4 |
4
|
style="background-color:Template:Element color" | Transition metal
|
Tl |
Thallium |
Greek thallos (shoot) |
81 |
&204.38332204.3833(2) |
13 |
6
|
style="background-color:Template:Element color" | Poor metal
|
Tm |
Thulium |
Thule and the traditional -ium ending |
69 |
&168.934212168.93421(2) |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
U |
Uranium |
Uranus |
92 |
&238.028913238.02891(3)[nb 1][nb 2][nb 4] |
|
7
|
style="background-color:Template:Element color" | Actinide
|
Uuo |
Ununoctium |
Latin uni, uni, and oct (one, one, eight) |
118 |
&294[294][nb 1] |
18 |
7
|
style="background-color:Template:Element color" | Unknown
|
Uup |
Ununpentium |
Latin uni, uni, and Greek pent (one, one, five) |
115 |
&288[288][nb 1] |
15 |
7
|
style="background-color:Template:Element color" | Unknown
|
Uus |
Ununseptium |
Latin uni, uni, and sept (one, one, seven) |
117 |
&294[294][nb 1] |
17 |
7
|
style="background-color:Template:Element color" | Unknown
|
Uut |
Ununtrium |
Latin uni, uni, and Greek tri (one, one, three) |
113 |
&284[284][nb 1] |
13 |
7
|
style="background-color:Template:Element color" | Unknown
|
V |
Vanadium |
Vanadis |
23 |
&050.9415150.9415(1) |
5 |
4
|
style="background-color:Template:Element color" | Transition metal
|
W |
Tungsten |
German wolfram (wolf-froth) |
74 |
&183.841183.84(1) |
6 |
6
|
style="background-color:Template:Element color" | Transition metal
|
Xe |
Xenon |
Greek xenos (alien) |
54 |
&131.2936131.293(6)[nb 2][nb 4] |
18 |
5
|
style="background-color:Template:Element color" | Noble gas
|
Y |
Yttrium |
Ytterby, Sweden |
39 |
&088.90585288.90585(2) |
3 |
5
|
style="background-color:Template:Element color" | Transition metal
|
Yb |
Ytterbium |
Ytterby, Sweden |
70 |
&173.043173.04(3)[nb 2] |
|
6
|
style="background-color:Template:Element color" | Lanthanide
|
Zn |
Zinc |
German zin (tin) |
30 |
&065.409465.409(4) |
12 |
4
|
style="background-color:Template:Element color" | Transition metal
|
Zr |
Zirconium |
zircon |
40 |
&091.224291.224(2)[nb 2] |
4 |
5
|
style="background-color:Template:Element color" | Transition metal
|
The following is a list of symbols formerly used or suggested for elements, including symbols for placeholder names and names given by discredited claimants for discovery.
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 |
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.
|
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