Atomic Mass Grade 8 Mrs. Hiba Kaadan

Master atomic mass calculation! This worksheet breaks down atomic number, protons, neutrons, and electrons for clarity.

1. Watch the following video about atomic mass (mass of the atom) then answer the attached questions. a. What is the atomic number? b. Why aren't electrons calculated in the mass of the atom? c. Write a formula to be used when calculating the atomic mass. (Do not forget the unit!!) d. Why do the chlorine atoms have the same atomic number but different numbers of neutrons? 2. Use this representation to answer the questions below. a. What is the atomic number and the mass number of Aluminum?b. Determine the composition of the aluminum atom.(Number of protons, electrons, and neutrons)c. Determine its atomic mass.