Name _________________________________________________Student # __________________
Isotope Notation and Average Atomic Mass Review
1. Define the following:
a. Mass Number-
b. Atomic Number-
c. Isotope-
2. Use the periodic table and the information given below to write the hyphen notation for each isotope
described.
a. atomic number = 2; mass number=4 _____________________________________
b. atomic number = 8; mass number= 16 ____________________________________
c. atomic number=19; mass number =39 ____________________________________
d. atomic number = 50; mass number= 65 ___________________________________
3. Write the following in nuclear (isotope) notation
a. zinc-66
c. plutonium-239
e. uranium-235
b. chlorine-35
d. helium-4
f. silver-108
4. Using the isotope Nitrogen-15 answer the following questions:
a. The number 15 is the ____________________ number
b. The number 7 is the ____________________number
c. How many neutrons does nitrogen 15 have? _______________
Mrs. Deemer
CP Chemistry 1
Chapter 3.3
Name _________________________________________________Student # __________________
5. Let’s play Who am I?
a. the atom with 12 protons and 12 neutrons _________________________
b. the atom with 6 protons and 7 neutrons __________________________
c. the atom with 79 protons and 117 neutrons ________________________
d. the copper atom that has 34 neutrons ____________________________
e. the iodine atom that has 72 neutrons _____________________________
6. Uranium-235 and uranium 236 are considered isotopes of one another. How are uranium-235 and
uranium-236 similar? How are they different?
7. Copper has 2 isotopes copper-63 and copper-65. The percent abundance of Copper-63 is 69.1% and
that of copper 65 is 30.9%. Find the average atomic mass of copper.
8. Lithium has 2 isotopes Lithium-6 and Lithium-7. The percent abundance of Lithium-6 is 7.42% and
that of Lithium-7 is 92.85%. Find the average atomic mass of lithium.
9. Silver has 2 isotopes silver-107 and silver-109. The percent abundance of silver -107 is 51.35% and
that of silver-109 is 48.65%. Find the average atomic mass of silver.
10. List the number of proton, neutron and electrons in zinc-66.
Mrs. Deemer
CP Chemistry 1
Chapter 3.3