Valence electrons in an atom are those that are...
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Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

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.

Will mark brainliest how many electrons can be held in the energy level n = 4?