Defenition of the word protoactinium

• Defenition of the word protoactinium

  • a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead

Synonyms for the word protoactinium

• • atomic number 91
  • Pa
  • protactinium

Hypernyms for the word protoactinium

• • metal
  • metallic element

See other words

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