A sample of silver as it occurs in nature is 52.0% of Ag-107 and 48.0% of Ag-109. What is the average atomic mass of silver? (Compare your result with the value given in the periodic table).

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.