Isotopes Worksheet
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3Isotopes Worksheet
1. What is an isotope? _____________________________________________________________
________________________________________________________________________________
2. What does the number next to isotopes signify? _______________________________________
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3. How can you tell isotopes apart? ___________________________________________________
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For each of the following isotopes, write the number of protons, neutrons, and electrons.
Chromium-58 Chromium-63
Carbon-12
Carbon-16
# of protons
# of protons
# of neutrons
# of neutrons
# of electrons
# of electrons
Nitrogen-15
Nitrogen-20
Sulfur-23
Sulfur-25
# of protons
# of protons
# of neutrons
# of neutrons
# of electrons
# of electrons
Sodium-12
Sodium-20
Selenium-30
Selenium-35
# of protons
# of protons
# of neutrons
# of neutrons
# of electrons
# of electrons
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