2.2 Atomic Number, Atomic Mass, Isotpoes

2.2. Differentiate between atomic number (# protons) and atomic mass (# protons + neutrons). Explain that the nucleus of the atom is much smaller that the atom yet contains most of its mass. Include in your discussion the concept of Isotopes. ( C.S. 1.e)
Use a periodic table to answer the following questions.

periodic table