Best Answer: Hi i got clear saphire braces. http://www.iceclearbraces.com/. very similar to ceramic braces but they disapear on your teeth more and cost the same as ceramic. Im from melbourne i went to different orthodontist the price range was 5,500-7,000, i found a place that did it for 6,300. If you pay everything up front you get a small discount of 3%.
Polyatomic ions are atoms held together by covalent bonds as a group and that from CHM 1220 at Wayne State University
Covalent bonds hold atoms together because the attraction between the positively charged nuclei and the negatively charged shared electrons is greater than the repulsions between the nuclei themselves. As two atoms approach each other, the electrons in their outer shells start to notice the nucleus of the other atom.