الإنجليزية - الإنجليزية
تعريف protactinium في الإنجليزية الإنجليزية القاموس.
- a chemical element (symbol Pa) with atomic number 91
- {i} radioactive metallic element
- a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
- eka-protactinium
- Unbitrium (Ubt), an unsynthesized chemical element with atomic number 123
- eka-protactinium
- Unquadunium (Uqu), an unsynthesized chemical element with atomic number 141
- protactinium.
- brevium