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One does not belong why? ice, gold ,wood ,diamond and table salt

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.

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?