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lead
Image: Wikimedia Commons

lead

Chemical element with symbol Pb and atomic number 82

Chemical elementchemical elementsimple substancesuperconducting elementQ708

Also known as element 82 · Pb

Symbol
Atomic number
  • 82
Mass
Melting point
  • 328°C
  • , 621°F
Boiling point
Density
  • 11.34 g/cm³

Overview

All data

467 statements · 9% with external sources · numbers in brackets are citations

Subclass of
NIOSH Pocket Guide ID
  • 0368
Has effect
Immediately dangerous to life or health
  • 100 milligram per cubic metre
Vapor pressure
  • 0 millimetre of mercury temperature: 68°F
Time-weighted average exposure limit
  • 0.05 milligram per cubic metre applies to jurisdiction: none · runtime: 8 h
Permanent duplicated item
Electronegativity
  • 2
Standard molar entropy
Formula
Canonical SMILES
Unicode character
Different from
Color
Has characteristic
Part of
Has use
Found in taxon
Ionic radius
  • 1.19 ångström charge number: 2 · coordination number: 6
  • 1.29 ångström charge number: 2 · coordination number: 8
  • 1.4 ångström charge number: 2 · coordination number: 10
  • 1.49 ångström charge number: 2 · coordination number: 12
  • 0.65 ångström charge number: 4 · coordination number: 4
  • 0.78 ångström charge number: 4 · coordination number: 6
  • 0.94 ångström charge number: 4 · coordination number: 8
Subject has role
Associated hazard
Made from material
Space group
Crystal system
Bulk modulus
  • 39.5B Pa
Shear modulus
  • 11.2B Pa
Poisson's ratio
  • 0.37
Thermal conductivity
  • 35 watt per metre kelvin
Electrical conductivity
  • 4,760,000 siemens per metre
Specific heat capacity
  • 131 joule per kilogram kelvin
Speed of sound
  • 1,260 m/s
Electrical resistivity
  • 2.08e-7 ohm metre
Point group
Standard enthalpy of formation
  • 195.2 kilojoule per mole state of matter: gas
  • 4.28 kilojoule per mole state of matter: liquid
Mohs' hardness
  • 1.5
Linear thermal expansion coefficient
  • 28.73 micrometre per metre kelvin temperature: 20°C
Ionization energy
Electron configuration
IPA transcription
Oxidation state
  • 2
  • 4
  • -4
  • -2
  • -1
  • 0
  • 1
  • 3
Show 3 more properties
Atomic radius
  • 180 picometre
Covalent radius
  • 146 picometre
Van der Waals radius
  • 202 picometre

On other databases

115 identifiers linking lead across the web's reference databases