List three characteristics of chemical reactions, I have five:
occur when bonds are broken and formed
atoms remain unchanged though they may be rearranged
involve only valence electrons
reaction rate is influenced by, temp, pressure, concentration, and catalyst
Three characteristics of nuclear reactions, I have five:
occur when nuclei emit particles
atoms are often converted into atoms of another element
may involve protons, neutrons, and electrons
reaction rate is not normally affected by temp, pressure or catalyst