Atomic Number 57 (Noun)
Meaning
A white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth.
Classification
Nouns denoting substances.
Examples
- Lanthanum, also known as atomic number 57, is a chemical element with the symbol La and atomic number 57.
- The atomic number 57 is a key identifier for the element lanthanum, which is a soft, silvery-white metal.
- In the periodic table, atomic number 57 is assigned to the element lanthanum, a member of the rare earth elements.
- The discovery of atomic number 57, also known as lanthanum, is attributed to Swedish chemist Carl Gustaf Mosander in 1839.
- The atomic number 57 is a unique identifier for the element lanthanum, which is used in specialized glasses, ceramics, and catalysts.