NIST   Physical Measurement Laboratory   Physical Reference Data
Elemental Data Index

Click on a symbol in the periodic table for information about an element.

You will see the element's atomic weight, ionization energy, ground-state level, and ground-state configuration, as well as all of the databases in which that element appears. If you are using the no-frames version of the database, use your browser's "Back" button to return to the table page from individual element data.

By clicking on a database icon, your browser will show the data for the element you selected with the database you selected or will provide a form with options to retrieve data for that element. When you are finished with the data, use your browser's "Back" button to return to the Elemental Data Index. For information and help with the databases, click [info] for the database you want to know more about.

Elemental Data Index Home