Definition

1. Noun:
   • A chemical element: "Atomic number 82" is the scientific term for the metallic element with the symbol Pb. It is a soft, dense, malleable, and toxic metal with a bluish-white appearance when freshly cut, which tarnishes to a dull gray.

Usage

• The term "atomic number 82" is used primarily in scientific, technical, and educational contexts to specify the element precisely by its fundamental property—the number of protons in its nucleus.
• In everyday language, this element is almost exclusively referred to by its common name, "lead."

Examples

• Noun:
  • The periodic table lists the element with atomic number 82 as Pb.
  • The sample was confirmed to be atomic number 82 through spectroscopic analysis.

Advanced Usage

• In Chemistry/Physics: The term is used to unambiguously identify the element, especially in formulas, research papers, and discussions about elemental properties or isotopes.
  • The decay chain ends at a stable isotope of atomic number 82.

Variants and Related Words

• Lead (Pb): The common name for the element with atomic number 82.
  • Lead pipes were commonly used in ancient Roman plumbing.
• Plumbum: The Latin origin of the symbol 'Pb' for atomic number 82.

Synonyms

• Lead: The standard and most common synonym.
• Plumbum: The Latin name, used historically or in specific contexts like medical terminology (e.g., plumbism).

Related Phrases/Idioms

(Note: Common phrases and idioms use the word "lead," not the technical term "atomic number 82.") - To go down like a lead balloon: To be received very badly or with disapproval. - To lead someone on: To deceive someone into believing one is interested in a romantic relationship.

Noun

1. a soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull grey
   • the children were playing with lead soldiers