How many element are there on the periodic table?

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration

From the choices provided below, list the reagent(s) in order that will react with cyclopentanone to form the compound shown below.

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.