• Organization: National Institute of Standards and Technology
• Updated: 2010-07-01 00:00:00

The atomic weights are available for elements 1 through 118 and isotopic compositions or abundances are given when appropriate. Version 3.0.

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• Organization: National Institute of Standards and Technology
• Updated: 2013-05-01 00:00:00

A periodic table, containing NIST critically-evaluated data on atomic properties of the elements [SP 966] was designed as a NIST handout for use at exhibitions and trade shows.

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• Organization: City of New York
• Updated: 2025-11-24

Atomic polygons serve as a set of basic building blocks for generating the polygons of many of the district types represented in the NYC Street Centerline (CSCL) database. Feature classes such as...

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• Organization: Department of the Interior
• Updated: 2020-08-31T00:00:00Z

Standard atomic weights of the elements 2015

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• Organization: National Institute of Standards and Technology
• Updated: 2014-09-19 00:00:00

References contained in this database are from Bibliography on Atomic Energy Levels and Spectra, NBS Special Publication 363 and Supplements, as well as current references since the last published...

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• Organization: Department of the Interior
• Updated: 2022-09-08T00:00:00Z

2016 four-figure standard and conventional atomic weights of the chemical elements

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• Organization: National Institute of Standards and Technology
• Updated: 2017-11-01 00:00:00

This database provides access and search capability for NIST critically evaluated data on atomic energy levels, wavelengths, and transition probabilities that are reasonably up-to-date. The Atomic...

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• Organization: National Institute of Standards and Technology
• Updated: 2014-09-19 00:00:00

This interactive database, maintained by the NIST Atomic Spectroscopy Data Center, contains more than 6000 references, dating from 1889 through current year and is updated regularly in intervals...

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• Organization: National Institute of Standards and Technology
• Updated: 2014-09-19 00:00:00

This interactive database, maintained by the NIST Atomic Spectroscopy Data Center, contains more than 8000 references, dating from 1914 through current year and is updated regularly in intervals...

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• Organization: Department of the Interior
• Updated: 2022-09-08T00:00:00Z

Four-figure standard atomic weights of the chemical elements are shown for 1961, 1975, 1983, 2007, 2009, 2011, 2013, 2015, and the current value for 2016. Values between 1975 and 2015 are only...

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• Organization: National Institute of Standards and Technology
• Updated: 2005-08-01 00:00:00

This handbook provides a selection of the most important and frequently used atomic spectroscopic data in an easily accessible format. The compilation includes energy levels, ionization energies,...

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• Organization: National Institute of Standards and Technology
• Updated: 2023-01-20 00:00:00

Experimental and modeling data from the manuscript: 'Integrating planar photonics for multi-beam generation and atomic clock packaging on chip', C. Ropp, et.al., accepted for publication in Light:...

• Organization: U.S. Department of Health & Human Services
• Updated: 2025-09-06

Background Quantitative information on the types of inter-atomic interactions at the MHC-peptide interface will provide insights to backbone/sidechain atom preference during binding....

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• Organization: National Institute of Standards and Technology
• Updated: 2009-03-01 00:00:00

Atomic Reference Data for Electronic Structure Calculations contains total energies, partial energies and orbital eigenvalues for the atoms hydrogen through uranium, as computed in several...

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• Organization: National Institute of Standards and Technology
• Updated: 2021-11-22 00:00:00

The package consists of a set of computer programs for calculation of energy levels, radiative transition wavelengths and probabilities, electron impact excitation and photoionization cross...

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• Organization: Department of the Interior
• Updated: 2020-10-08T00:00:00Z

The nanoscale molecular composition of kerogen is a challenging parameter to characterize given the chemical and structural complexity exhibited by this important biopolymer. However, kerogen...

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• Organization: National Institute of Standards and Technology
• Updated: 2024-04-18 00:00:00

Individual user responsibility: working data, derived data Data must be backed up using a tested/automated process: working data, derived data; published data resource data Not available to the...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2024-04-25T00:00:00.000+00:00

The Atlantic Tradewind Ocean-Atmosphere Mesoscale Interaction Campaign (ATOMIC) was a field campaign held January-February 2020 in the tropical North Atlantic east of Barbados. The campaign, the...

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• Organization: National Institute of Standards and Technology
• Updated: 2024-05-08 00:00:00

The Authoring Tools for Multimedia Content (AToMiC) Track aims to build reliable benchmarks for multimedia search systems. The focus of this track is to develop and evaluate IR techniques for...

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• Organization: Department of the Interior
• Updated: 2020-08-31T00:00:00Z

Twelve chemical elements have intervals for their standard atomic weights, namely hydrogen, lithium, boron, carbon, nitrogen, oxygen, magnesium, silicon, sulfur, chlorine, bromine and thallium....

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