A short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead. Synonyms: atomic number 91, Pa, protoactinium.
|
|
|
|
 | | | |||
|
|
|
|
Words linked to "Protactinium" : metallic element, metal, atomic number 91, protoactinium |
Copyright © 2025 Free Translator.org |
