The number of neutrons in the nucleus of an atom can be calculated by 1. adding together the numbers of electrons and protons 2. subtracting the number of protons from the number of electrons 3. subtracting the number of protons from the mass number 4. adding the mass number to the number of protons

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.