When silver coins are found in ancient shipwrecks, they are coated with a black crust. what question could you ask to you decide whether the silver underwent a chemical change or a physical change? explain.

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.