8. if an atom has 35 protons in the nucleus, how many electrons will it have orbiting the nucleus?

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

Mercury metal is poured into a graduated cylinder that holds exactly 22.5 ml the mercury used to fill the cylinder mass in 306.0 g from this information calculate the density of mercury