Bibliography

www.rcs/periodic-table/element/12/element

www.periodic.lanl.gov/12.shtml

www.lenntech.com

www.chemicalelements.com/show/electronconfig.html

www.webmd.com

www.hobart.k12.in.us.ksms/periodictable/magnesium.htm

www.webelements.com/magnesium/

http://study.com/academy/lesson/valence-electron-definition-example.html