Enos,+Kayla

Name and symbol of element--- Pb, lead

[|Boiling point]--- 1749 degree C

Melting point--- 327.46 degree C

Specific gravity/density--- 11343 kg

Number of protons, neutrons, electrons--- 82, 126, 82

Atomic mass--- 207.2g

Atomic number---82

[|Electron configuration and orbital notation]---1s2_2s2_2p6_3s2_3p6_3d10_4s2_4p6_4d10_4f14_5s2_5p6_5d10_6s2_6p2, 4f14_5d10_6s2_6p2

Number of valence electrons--- 4 valence electrons

How, when and who discovered---there really isn't any information of how lead was discovered but it dates back to the Roman Empire when they used it for plumbing. Who discovered it is unknown as well.

Where and how produced, processed, or mined---lead is found in nature sparingly, and separated by smelting.

Chemical and physical properties---solids and liquids

[|Minerals, compounds, or ores in which found]--- galena, anglesite, minim, cerussite, and other minerals. Galena is the most important source

Two common chemical reactions---lead alone does not react with oxygen or water, but acts vigorously with halogens.

Industrial and commercial uses---it's used in storage batteries, cable covering, and plumbing

Cost or value--- cost, pure is $2.45 per 100g and cost, bulk is $0.02 per 100g

Unusual facts---lead is detrimental to health, especially children, all uses of lead have been banned because of that. Lead is very toxic and has no known biological role.

Credits Element information http://www.rsc.org/periodic-table/element/82/lead Royal Society of Chemistry 2014

Web elements http://www.webelements.com/lead/uses.html Unknown 2011

Chemicool http://www.chemicool.com/elements/lead.html David D. Hsu 2014