2. Draw the atomic structure of a sodium atom and a sodium ion....explain why you draw it this way.

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhlF5vDL1_N-xq7plD6YADEOqZOn_0TwwOtFxNJxPzEmLsDj3I4-_kYVwdvngGZucfOZqdmlKdG5bBE1LQJAApqhVWY4ArXLh5slCDMKGu7b7EGWibg32m_mtGmQnGbWEeSoWQ6OXjxG47c/s320/Sodium-Atom-Sodium-Ion.gif




http://iss.cet.edu/electricity/pages/images/b/b11_5.jpg


Ionic bonds are formed when metallic atoms has given away their valence electrons to the non-metallic atoms.
The transfer of valence electrons from the metallic to the non-metallic atoms enables both atoms to achieve stablility.  (stable noble gas configuration)
oppositely charges ions are formed which will attacted to each other due to the strong electrostatic forces of attraction, that form the ionic bonds.

THerefore,  i drew the sodium atom that way as its has 11 electrons .

http://www.google.com.sg/imgres?imgurl=http://www.scioly.org/w/images/1/1b/Electron_shell_011_Sodium.svg.png&imgrefurl=http://www.scioly.org/wiki/GMOA_Notes&usg=__BWr41JgSP1sAjIKSHoywbKX933Q=&h=194&w=180&sz=10&hl=en&start=14&zoom=1&itbs=1&tbnid=M0tsb3vKAyYmyM:&tbnh=103&tbnw=96&prev=/images%3Fq%3Dthe%2Batomic%2Bstructure%2Bof%2Ba%2Bsodium%2Batom%2Band%2Ba%2Bsodium%2Bion.%26hl%3Den%26gbv%3D2%26biw%3D1003%26bih%3D622%26tbm%3Disch&ei=w7MZTqOSLsXVrQfGzPzPAQ


 Its electronic configuration is (2.8.1). It has 1 extra valence electron. thus, sodium ion is drawn  that way because it has given away it in order to become stable . Hence, its electronic configuration has become ( 2.8 ) after that removal of that electron. and is now positely charge

        


http://www.gcsescience.com/sodium-ion.gif