Atoms And Isotopes Worksheet
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2Name _________________________________ Period _________ Date _____________
Atoms and Isotopes Worksheet
1. Fill in the table with the correct information.
Isotope
Isotope
Atomic #
Protons
Electrons
Neutrons
Notation
Oxygen-16
Bromine-80
Uranium-
235
Copper-64
2. Describe the general arrangement of subatomic particles in the atom.
3. What contribution did these scientists make to atomic models of the atom?
a. Dalton
b. Thomson
c. Rutherford
4. What is the isotope notation of the element that has an atomic number of 24 and a mass number of 52?
5. What part of the atom contains practically all its mass?
6. How do the isotopes of an element differ? How are they the same?
7. Which element contains the largest number of neutrons per atom?
a. Bismuth-210 b. Polonium-210
c. Astatine-210
d. Astatine-211
8. Fill in the following table.
Isotope
Isotope
Atomic #
Protons
Electrons
Neutrons
Notation
Nickel-58
15
15
53
74
36
48
34
45
Calcium-40
Chlorine-37
9. Calculate the average atomic mass of chlorine if its isotopes and % abundances are as follows. Show
all work.
Mass of Isotope
% abundance
36.96590
24.47
34.96885
75.53
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