List of elements by symbol
This is a list of chemical elements by symbol, including the current signification used to identify the chemical elements as recognized by the International Union of Pure and Applied Chemistry, as well as proposed and historical signs. Also given is each element's atomic number, atomic mass or most stable isotope, group and period numbers on the periodic table, and etymology of the symbol.
NOTE: placing one's cursor over the entry in the etymology column will display a modern English translation for words of Greek, Latin, or other origin.

# Current symbols

# 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) are not included in this table.

## Pictographic symbols
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 Jons Jakob Berzelius.
-  Jump up to: 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24 1.25 1.26 1.27 1.28 1.29 1.30 1.31 1.32 1.33 1.34 1.35 The element does not have any stable nuclides, and a value in brackets, e.g. , 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.
-  Jump up to: 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.24 2.25 2.26 2.27 2.28 2.29 2.30 2.31 2.32 2.33 2.34 2.35 2.36 2.37 2.38 The isotopic composition of this element varies in some geological specimens, and the variation may exceed the uncertainty stated in the table.
-  Jump up to: 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 3.11 3.12 3.13 3.14 The isotopic composition varies in terrestrial material such that a more precise atomic weight can not be given.
-  Jump up to: 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 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 6.996analysis of the specific material is necessary to find a more accurate value.
-  Jump up to: 6.00 6.01 6.02 6.03 6.04 6.05 6.06 6.07 6.08 6.09 6.10 6.11 6.12 6.13 6.14 6.15 6.16 6.17 6.18 6.19 6.20 6.21 6.22 6.23 6.24 6.25 6.26 6.27 6.28 6.29 6.30 6.31 6.32 6.33 6.34 6.35 6.36 6.37 6.38 6.39 6.40 6.41 6.42 6.43 6.44 6.45 6.46 6.47 6.48 6.49 6.50 6.51 Name changed due to a standardization of, modernization of, or update to older previously used symbol.
-  Jump up to: 7.00 7.01 7.02 7.03 7.04 7.05 7.06 7.07 7.08 7.09 7.10 7.11 7.12 Name designated by discredited/disputed claimant.
-  Jump up to: 8.00 8.01 8.02 8.03 8.04 8.05 8.06 8.07 8.08 8.09 8.10 8.11 8.12 8.13 8.14 8.15 8.16 8.17 8.18 8.19 8.20 8.21 8.22 8.23 Name proposed prior to discovery/creation of element or prior to official re-naming of a placeholder name.
-  Jump up to: 9.00 9.01 9.02 9.03 9.04 9.05 9.06 9.07 9.08 9.09 9.10 9.11 9.12 9.13 9.14 Temporary placeholder name.

# Symbols for named isotopes
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.

# Other symbols that look like element symbols
- Ab: albite
- Ac: acetate - (also used for the element actinium: see above)
- Ar: aryl - (also used for the element argon: see above)
- Bn: benzyl
- Bu: butyl
- Bz: benzoyl - (also used for berzelium, an old suggested name for praseodymium).
- Di: didymium - Rare earth metal that proved to be a mixture of the elements praseodymium and neodymium.
- Dp: decipium - Rare earth metal that proved to be a mixture of the elements samarium, neodymium and praseodymium.
- Et: ethyl
- M: metal - any metal atom
- Me: methyl
- Mu: muonium
- Ph: phenyl
- Pp: philippium - rare earth metal that proved to be a mixture of the elements holmium and samarium.
- Pr: propyl - (also used for the element praseodymium: see above)
- Ps: positronium
- R: radical - some unspecified element or radical

# Notes