20. draw a flow chart of sequence of events taking place in respiration process in humans. (hint: external respiration – breathing & internal respiration – cellular respiration)

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.