-Which contains more atoms: 1kg of lead or 1kg of aluminum? Why? -The atomic masses of two isotopes of cobalt are 59 and 60(a) What is the number of protons and neutrons in each? (b) What is the number of electrons in each when the isotopes are electrically neutral?
1 kg of aluminum contains more atoms than 1 kg of leadAluminum atoms have a smaller molar mass than lead and it would take more of them to equal the same massCobalt has 27 protonscobalt-59 would have 59-27 32 neutronsCobalt 60 would have 60-27 33 neutronsThey would each have 27 electrons.
