element 109
Definition
- Noun:
- A radioactive transuranic element: "element 109" is the provisional, systematic name for a synthetic, highly radioactive chemical element with the atomic number 109. It is a transuranic element, meaning it is heavier than uranium. Its official, permanent name is meitnerium.
Usage Examples
- Noun:
- Scientists synthesized element 109 in a laboratory by bombarding a bismuth target with iron ions.
- Before its official naming, element 109 was known by its systematic placeholder name.
Advanced Usage
- In scientific literature: The term "element 109" is primarily used in historical contexts or in systematic nomenclature before an element receives a permanent name. In modern contexts, the name "meitnerium" is standard.
- The discovery of element 109 was confirmed in 1982 at the Gesellschaft für Schwerionenforschung (GSI) in Germany.
Variants and Related Words
- Meitnerium (Mt): The official, permanent name for element 109, named after the physicist Lise Meitner.
- Meitnerium is predicted to share chemical properties with cobalt, rhodium, and iridium.
- Transuranic element: Any chemical element with an atomic number greater than 92 (uranium). Element 109 belongs to this category.
- All transuranic elements, including element 109, are unstable and radioactive.
Synonyms
- Meitnerium: The official synonym and permanent name.
- Systematic element name 109: A formal synonym emphasizing its place in the systematic naming convention for undiscovered or newly synthesized elements (e.g., un-nil-ennium was once used).
Related Phrases
- To synthesize an element: This phrase is commonly associated with the creation of heavy elements like element 109 in particle accelerators.
- The team worked for years to synthesize element 109 and prove its existence.
Noun
-
a radioactive transuranic element
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