Lead

Statistics:

• Name: Lead
• Symbol: Pb
• Classification: Poor Metals
• Atomic Number: 82
• Atomic Mass: 207.2 g/mol
• Density: 11.34 g/cm³
• Melting: 327.5°C
• Boiling: 1740°C
• Protons & Electrons:82
• Neutrons:125
• Discovered: prehistoric
• Discovered By: unknown
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 18
• Level 4: 32
• Level 5: 18
• Level 6: 4

Isotopes:

Isotope: Half-life

• ²⁰²Pb: 5.25e4 years
• ²⁰³Pb: 51.873 hours
• ²⁰⁴Pb: 1.4e17 years
• ^204m1Pb: 67.2 minutes
• ²⁰⁵Pb: 1.53e+7 years
• ²⁰⁶Pb: stable
• ²⁰⁷Pb: stable
• ²⁰⁸Pb: stable
• ²⁰⁹Pb: 3.253 hours
• ²¹⁰Pb: 22.3 years
• ²¹¹Pb: 36.1 minutes
• ²¹²Pb: 10.64 hours
• ²¹⁴Pb: 26.8 minutes

Brief Summary

Lead is a Poor Metals with the symbol 'Pb' and contains 82 Protons & Electrons with 125 neutrons in the nucleus of the atom. Lead has an atomic mass of 207.2 g/mol and, at a temperature of 20°C, has a density of 11.34 g/cm³. It will melt at a temperature of 327.5°C and boil at 1740°C.

Lead has been known since prehistoric times and is named 'Lead' Greek word "protos" meaning "first".

Some common usages for Lead: solder and shielding against radiation, batteries.

Definitions and Notes

Density listed is at a temperature of 20°C.

Isotopes are forms of an element who have the same atomic number but different mass because they contain different number of neutrons.

Half-life is the time required for a quantity of a subject to fall to half of its current quantity.

MLA Citing Format

Lead :: Pb :: 82 - Chemical Element. 10 Mar. 2010 <http://www.chemicalelement.com/element/lead.html>.