Links
[1] https://hootsgo.org/?q=node/6433
[2] http://en.wikipedia.org/wiki/Electron_configuration
[3] http://chemwiki.ucdavis.edu/Inorganic_Chemistry/Electronic_Configurations
[4] http://www.wikihow.com/Write-Electron-Configurations-for-Atoms-of-Any-Element
[5] http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch6/quantum.html
[6] http://education.jlab.org/qa/electron_config.html
[7] http://electronconfiguration.info/
[8] https://www.chem.wisc.edu/deptfiles/genchem/sstutorial/Text5/Tx54/tx54.html
[9] http://web.clark.edu/nfattaleh/classes/141_151/lecturenotes/141troch8.pdf
[10] http://campus.kellerisd.net/Teachers/10676/Classroom%20Information/Pre-AP%20Chemistry/Electron%20configuration,%20orbital%20notation/05%20Electron%20Configurations%20Orbital%20Notation%20and%20Quantum%20Numb.pdf
[11] https://www.sccollege.edu/Departments/STEM/Documents/Handouts/Electron%20Configuration.pdf
[12] http://www2.sunysuffolk.edu/sambass/index_files/ch33/lectures/chapter07.pdf
[13] http://www.oneonta.edu/faculty/viningwj/Chem111/Chapter07.pdf
[14] http://www.emsb.qc.ca/laurenhill/science/configuration.pdf
[15] http://wikieducator.org/images/3/35/Electronic_config.pdf
[16] http://www.profpaz.com/Files/chem101/Chap_08B.pdf
[17] http://www.pickerington.k12.oh.us/docs/olc/newsdocs/Electron%20Configuration%20Notes%20-0.pdf