element 109

Thân thiện

A scientist carefully handles a sample of element 109 in a secure laboratory.

Definition

1. 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.

Học thuật

Noun

1. a radioactive transuranic element

Từ đồng nghĩa

• meitnerium
• Mt
• atomic number 109