Atomic Number 59 (Noun)
Meaning
A soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process.
Classification
Nouns denoting substances.
Examples
- Praseodymium is a chemical element with the atomic number 59 and the atomic symbol Pr.
- Praseodymium, atomic number 59, is a silvery-metallic element of the lanthanide group.
- In the periodic table of the elements, praseodymium has atomic number 59 and atomic mass 140.9076.
- Atomic number 59, Praseodymium is the 15th element of the lanthanide series.
- By 1931 neodymium had proved to be the more common element and praseodymium the rarer atomic number 59, explaining the re-naming.