References
[1]Brown T. E., LeMay H. E., Bursten B. E.,
Chemistry: the central science, Prentice Hall,
2012.
[2]https://www.ausetute.com.au/pbbattery.html (Retrieved February 01, 2019)
[3]http://chem.ch.huji.ac.il/nmr/techniques/1d/row6/pb.html (Retrieved February 01, 2019)