The average atomic mass found on the periodic table is the weighted average of the masses of all the isotopes of that element. Read the text, p.162-167 for help.
Homework due Monday: p.167-168 #2-4; p.170 Section Review #1, 3, 4
Homework due Monday: p.167-168 #2-4; p.170 Section Review #1, 3, 4