atomic number 63
Definition
- Noun:
- A bivalent and trivalent metallic element of the rare earth group: This is the chemical element with the symbol Eu and atomic number 63. It is a moderately hard, silvery metal that is part of the lanthanide series.
Usage Examples
- Noun:
- Europium, atomic number 63, is used in the phosphors of television screens.
- The sample was analyzed and found to contain traces of atomic number 63.
Advanced Usage
- Scientific Context: The term "atomic number 63" is primarily used in scientific, technical, and educational contexts to specify the element europium by its fundamental property—the number of protons in its nucleus.
- In the periodic table, atomic number 63 falls between samarium (62) and gadolinium (64).
Variants and Related Words
- Europium (Eu): This is the common name for the element represented by atomic number 63.
- Europium is the most reactive rare earth element.
Synonyms
- Europium: The standard name for the element.
- Eu: The chemical symbol.
Notes on Meaning
- The term "atomic number 63" has a single, precise meaning in chemistry and physics, referring exclusively to the element europium. It is not used in idiomatic or figurative language.
Noun
-
a bivalent and trivalent metallic element of the rare earth group
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