A
reaction in which one or more
molecules change into one or more different
molecules. The same
atoms are present in the
products as were in the
reactants, but they will be combined differently into molecules and mayhave exchanged
electrons.
Chemical reactions happen all around us and within us all the time, as part of the normal way things operate.
Distinguished from physical change in which the molecules present don't change, and nuclear reaction in which the exchange of protons causes the atoms present to change.
Chemists study known chemical reactions and devise new ones. Chemical engineers determine how to apply chemical reactions in real life to make desired chemicals.
Yep, another one from the nrt...