2Comparison Of Chemical and Nuclear ReactionsNuclear Reactions1Elements may be converted from one to another.2Particles within the nucleus, such as protons and neutrons, are involved in reactions.Chemical Reactions1No new elements can be produced, only new chemical compounds.2Usually only the outer most electrons participate in reactions.
3Comparison Of Chemical and Nuclear ReactionsNuclear Reactions3Release or absorb immense amounts of energy, typically 1000 times more.4Rates of reaction are not influenced by external factors.Chemical Reactions3Release or absorb much smaller amounts of energy.4Rates of reaction depend on factors such as concentration, pressure, temperature, and catalysts.
4The NucleusRemember that the nucleus is comprised of the two nucleons: protons and neutrons.The number of protons is the atomic number.The number of protons and neutrons together is effectively the mass of the atom.
5The NucleusTerminology used in nuclear chemistry.1.Nucliderefers to a nucleus with specific numbers of protons and neutrons.2.Isotopesare nuclei that have the same number of protons but different neutron numbers.Isotopes are the same element.
6RadioactivityNuclides of many elements are unstable. They decay spontaneously, emitting subatomic particles and electromagnetic radiation.We refer to these nuclides as radioactive.