Definition

1. Noun:
   • A chemical element: "atomic number 76" is the scientific term for the chemical element osmium. It refers to a hard, brittle, blue-grey or blue-black metallic element that is one of the six platinum-group metals and is the densest naturally occurring element.

Usage

• The term "atomic number 76" is used primarily in scientific, technical, and educational contexts to specify the element osmium by its unique position on the periodic table. The atomic number (76) indicates the number of protons in the nucleus of an atom of this element.

Examples

• Noun:
  • Osmium, atomic number 76, is used in some alloys for its extreme hardness.
  • The sample was confirmed to contain traces of atomic number 76.

Advanced Usage

• In periodic table notation: The element is often denoted as 'Os', with 76 as its subscript (₇₆Os).
  • The isotope Osmium-187, ⁷₆Os, is stable.

Variants and Related Words

• Osmium (Os): The common name for the element with atomic number 76.
• Platinum-group metal (PGM): A family of six metallic elements, which includes atomic number 76 (osmium).

Synonyms

• Osmium: The direct synonym and common name for atomic number 76.

Related Phrases

• Heaviest metal: A descriptive phrase often associated with atomic number 76 due to its high density.
  • Atomic number 76 is frequently cited as the heaviest metal.

Noun

1. a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known