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EntityQ708· pop 189· linked from 5,459 articles

鉛

Also known as Pb, element 82

原子番号82の元素

OverviewAI-generated

Lead is a chemical element with the symbol Pb and atomic number 82. Its standard molar entropy is 64.8, and it has a mass of 207.2. The element has a density of 11.34 and an electronegativity of 2. Its ionic radius is 1.49. Lead melts at 621 and boils at 3164.

The substance is associated with the Commons category and gallery titled "Lead." It is referenced by 5,459 other encyclopedia articles. In medical contexts, the time-weighted average exposure limit is 0.05, and the level immediately dangerous to life or health is 100. The NIOSH Pocket Guide ID for lead is 0368.

Chemical identifiers include the formula Pb and the canonical SMILES string "[Pb]". The Unicode character for lead is "鉛". PubChem lists the compound weight as 207 and the IUPAC name as lead. It has zero hydrogen bond donors and acceptors, with a topological polar surface area of 0. PubMed records 962,367 entries for the query "lead."

Synthesized by Vinony from 30 facts across 4 sources: Wikidata, PubChem, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.