When calcium chloride is added to a sample of water, the boiling point will . A. increase B. decrease C. not change D. first decrease, then increase

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.