Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
UPGRADE TO PRO
APPS
TOUR
Sign in
promethium element
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
Input interpretation
Basic elemental properties
More
Sources
Download Page
POWERED BY THE
WOLFRAM LANGUAGE
