Hoffer,+Jonathan

= Lead,Pb =

- boiling point is 3,182 F or (1,750 C)

-melting point is 621.5 F or (327.5 C)

- the specific density -11.34g/cm^3 and gravity-11,340

- the protons-82,neutrons-125,electrons-82 of lead

-the atomic mass 207.3+0.1u

-the atomic number is 82

-the electron con.-2,8,18,32,18,4 and the orbital notation-(Xe)4f145d106s26p2

-the number of valence electrons is 4

-lead was discovered by the ancients in 7000BC

-european mining for lead started in 1720. mining in the upper region of mississippi in 1865 for lead. -two common chemical reactions of lead is water and flourine

-it can be used for acid storage batteries,ammunition,solder,sheet lead

-the cost/value of lead is $0.10-$0.15 for a pound of wheel weights

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- can also cause kidney damage,brain damage,a rise in blood pressure