Most sodium atoms have an atomic mass of 23, but a few have atomic masses of 22 or 24. How do these isotopes differ from one another?
A. In the number of ions
B. In the number of neutrons
C. In the number of protons
D. In the number of electrons

1) when you rub your hands together quickly, the kinetic energy is converted to mechanical energy.2) thermal energy from the sun travels to earth as infrared waves.3) energy is transferred through the matter of space by electromagnetic waves. 4) when a match is burned, chemical potential energy is converted to thermal and radiant energy. 5) seismicwaves are caused by back and forth movement , or vibration, of an object. 6) mechanicalenergy in an engine changes thermal energy into kinetic energy to make a car move.