Crossword clue: a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms

The most common answer is americium (9 letters).

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

americium 9 letters wn-def

a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms