Science 9 – TheWorksheets.CoM

Science 9 - Miss Zukowski's Class

• The mass number _____ appear exactly like this on the periodic table. H : ____ p,___ n , He: ____ p,____ n o BE CAREFUL! The larger of the two numbers (usually on the bottom) shown on your periodic table is the relative _____. It is the average mass number of the element (average of the isotopes).