A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead. Synonyms: atomic number 91, Pa, protactinium.
|
|
|
|
 | | | |||
|
|
|
|
Words linked to "Protoactinium" : metallic element, atomic number 91, protactinium, metal |
Copyright © 2024 e-Free Translation.com |
