americium

/,æmə'risiəm/

Thân thiện

A scientist carefully handles a sample of americium in a secure laboratory.

Definition

1. Noun:
   • A radioactive transuranic metallic element: Americium is a synthetic, radioactive chemical element with the symbol Am and atomic number 95. It is a member of the actinide series and is produced artificially by bombarding uranium or plutonium with neutrons.

Usage Examples

• Noun:
  • Americium-241 is commonly used in household smoke detectors.
  • Scientists discovered americium in 1944 during the Manhattan Project.

Advanced Usage

• "Americium oxide" (AmO₂): A common chemical compound of americium.
  • The americium oxide source is carefully sealed within the ionization chamber of the detector.

Variants and Related Words

• Actinide (n): Any of the series of fifteen metallic elements from actinium (atomic number 89) to lawrencium (atomic number 103). Americium is an actinide.
• Transuranic element (n): Any chemical element with an atomic number greater than 92 (uranium). Americium is a transuranic element.

Synonyms

• Element 95: Refers to americium by its atomic number.
• Am: The chemical symbol for americium.

Học thuật

Noun

1. a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms

Từ đồng nghĩa

• Am
• atomic number 95