In the form of edible or table salt it is commonly used as a condiment and food preservative. Large quantities of sodium chloride are used in many industrial processes, and it is a major source of sodium and chlorine compounds used as feedstocks for further chemical syntheses.n the language of close-packing, the larger chloride ions are arranged in a cubic array whereas the smaller sodium ions fill all the cubic gaps (octahedral voids) between them. This same basic structure is found in many other compounds and is commonly known as the halite or rock-salt crystal structure.
1 Most dental schools are 4 years, a few are 3. About half of the orthodontic schools are 2 years and the rest are 3 years. 2  it takes 4 years of undergraduate education (usually, it can take 2-3 if you have exceptional credentials) and then 3-4 years in dental school (depending on a particular schools curriculum).
My dear, you need to study study study before you even get near a hospital (above nurse rank anyway). You'll be nearly 30 before you've finished so don't worry about work just yet. If you want to become a doctor you need to go to university its not something you can just do as work experience. Your dealing with peoples health and they aren't going to let you do anything if your not qualified. Also and no offence intended but unless you learn some grammar and learn how to spell your not going to be accepted into university.