Example of how to reference this online database: (Replace year, month day with database access date.)
- R.A. Dragoset, A. Musgrove, C.W. Clark, W.C. Martin, and K. Olsen, (2017), Periodic Table: Atomic Properties of the Elements (Version 12), NIST SP 966. [Online] Available: http://physics.nist.gov/pt [year, month day]. National Institute of Standards and Technology, Gaithersburg, MD.
- Citation Form:
- Author/editor (Year), Title (edition). [Type of medium] Available: URL [Access date].
|The value of the electron volt has been rounded to 1.602 177 x 10-19 J.|
|Small typographical edits were made.|
|For elements 113, 115, 117, and 118 updated the element names and symbols to reflect these newly discovered elements.|
Redesign of the Periodic Table. Several numerical values have been updated. The standard atomic weight of ytterbium has been revised from 173.054 to 173.045. The values of the fundamental physical constants have been updated to the 2014 CODATA recommended values. For elements 103, 107, 108, 109, 111, 113, 115, the mass number of the longest-lived isotope has been updated.
|Added the September 2014 version of the Periodic Table in PDF and TIFF formats. Values in parentheses indicate the mass number of the longest-lived isotope. Values marked with an asterisk: IUPAC conventional atomic weights, standard atomic weights, for these elements are expressed in intervals. See www.iupac.org for explanation and values.|
|Added the March 2013 version of the Periodic Table in PDF and TIFF formats.|
|A PDF version of the Periodic Table without crop marks is now available.|
|The online version of the Periodic Table has been updated to the most recent printed version, which is dated September 2010. There was also a September 2009 version. Since version 4, elements have been added such that there are no "missing elements" from 1 to 118. Several official names have been added for high Z elements.|
|A home page and version history for the periodic table were designed and a high-resolution TIFF file was made available; fifth & sixth printings of NIST SP 966 occurred in September 2004 & September 2005 with no changes to the data values.|
|The ionization energy value was updated for Po; fourth printing of NIST SP 966.|
|The ionization energy values were updated for Ne, Pu, and Cm; the atomic weight values were updated for Zn, Kr, and Dy; and the element with atomic number 118 was removed from the periodic table after a retraction by the Lawrence Berkeley National Laboratory; third printing of NIST SP 966.|
|The ionization energy values were updated for Y, Sm, Gd, Pt, and Bi; elements with atomic number 114, 116 & 118 were added to the periodic table; second printing of NIST SP 966.|
|Periodic Table: Atomic Properties of the Elements available online as a PDF file. All data contained in the periodic table are available from the following three databases:|
|First printing of this NIST handout.|