Lead

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Boston Latin Academy, Boston, Massachusetts, U.S.A.

Lead, 82, Boston Latin Academy, Massachussetts USALead: The 88 students in my regular chemistry classes at Boston Latin Academy, a public exam high school, created two periodic table squares each. One square was an element unique to them and the other was lead. I selected lead because in my previous career, I worked on many hazardous waste sites contaminated with lead. My classes will make a periodic table with the individual squares to celebrate the International Year of Chemistry. This lead square, created by 11th grader Katy Carchedi, represents sources of lead in household drinking water which is a public health problem in buildings with older pipes containing lead solder. 

Katherine Fogarty, Teacher Chemistry and Environmental Science Boston Latin Academy, Boston, Massachusetts, U.S.A.

Atomic properties*

Name:
Lead
Symbol:
Pb
Atomic number:
82
Atomic mass:
207.2 amu
Melting point:
327.46°C
Boiling point:
1749°C
Density:
11.3 g/cm3
Electronegativity:
1.8
# of Isotopes:
5
State:
Solid
Colour:
Bluish-white**
Classification:
Metallic**
 

* Haynes, W. M. (2011). CRC Handbook of Chemistry and Physics, 91st edition: http://www.hbcponline.com/ Retrieved April 7, 2011

** Winter, M. (2010). Home of the Periodic Table. Retrieved April 8, 2011, from Web Elements: http://www.webelements.com/