unq
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Definition
- Noun:
- A radioactive transuranic element which has been synthesized: "Unq" is a temporary, systematic name for a specific chemical element. It is a synthetic, radioactive element with an atomic number of 104.
Usage Notes
- "Unq" is not a common word in general English. It is a highly specialized term used primarily in the field of chemistry, specifically in nuclear chemistry and physics.
- This term is a placeholder or systematic name from a historical nomenclature system for undiscovered or newly synthesized elements. It is formed from the Latin roots for the digits of its atomic number: "Un" for 1, "n" for 0, and "q" for 4.
- In modern, official use, this element is known by the permanent name rutherfordium (symbol Rf).
Examples
- Noun:
- The element with atomic number 104 was once referred to as unq.
- Scientists synthesized unq by bombarding a target with heavy ions.
Advanced Usage
- Systematic element names: "Unq" is part of an old systematic naming convention (IUPAC 1978 recommendations) for elements with atomic numbers greater than 100. The current convention uses different roots (e.g., "quad" for 4).
- Historical context: The name "unq" was part of a naming controversy. Different research groups proposed different names (e.g., kurchatovium, rutherfordium) before "rutherfordium" was officially adopted.
Variants and Related Words
- Rutherfordium (Rf): The permanent, official name for the element once called "unq".
- Transuranic element: A category of elements with atomic numbers greater than uranium (92), to which unq/rutherfordium belongs.
- Synthetic element: An element not found naturally on Earth and produced artificially in laboratories, like unq.
Synonyms
- Rutherfordium: The official synonym and modern name.
- Element 104: A direct numerical designation.
Related Phrases/Idioms
(Not applicable. "Unq" is a technical term with no idiomatic or phrasal verb usage.)
Noun
- a radioactive transuranic element which has been synthesized