What determines an atom's reactivity? a)how many protons the atom contains. b)how many energy levels the atom contains. c)whether the atom is a metal or a nonmetal. d)how many valence electrons the atom contains. plz

Which of the following is true about countries like england after they industrialized? a. workers usually made less money. b. people began moving to the country. c. time for leisure activities decreased. d. overall standard of living increased.