atomic number 57
noun
- 1
a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
Also useful for “atomic number 57”:Crossword— Multi-word entries show up in clues
a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
Also useful for “atomic number 57”:Crossword— Multi-word entries show up in clues