Counting Subatomic Particles Worksheet 2 by JR8NHd

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									NAME: _____________________           Isotopes Worksheet    Pd:______       DATE: ___/___/___

1. What is an isotope? _____________________________________________________________
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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.
    Assume all atoms are balanced (have zero charge) unless and until I tell you otherwise
                 58           63                                  13            16
Chromium          Cr             Cr      Carbon                    C             C

# of protons                             # of protons

# of neutrons                            # of neutrons

# of electrons                           # of electrons

Atomic #                                 Atomic #

Atomic Mass                              Atomic Mass
Total Positive                           Total Positive Charge
Charge
Total Negative                           Total Negative Charge
Charge
Sum of the                               Sum of the Charges
Charges
                 12         20                                     60            65
NAME?                 Na      Na          NAME?                        Se            Se

# of protons                              # of protons

# of neutrons                             # of neutrons

# of electrons                            # of electrons

Atomic #                                  Atomic #

Atomic Mass                               Atomic Mass
Total Positive                            Total Positive Charge
Charge
Total Negative                            Total Negative Charge
Charge
Sum of the                                Sum of the Charges
Charges
NAME?                 Symbol?     Symbol?        NAME?                      Sumbol?     Symbol?

# of protons            25            25         # of protons

# of neutrons           17            15         # of neutrons                113         111

# of electrons                                   # of electrons               55          55

Atomic #                                         Atomic #

Atomic Mass                                      Atomic Mass
Total Positive                                   Total Positive Charge
Charge
Total Negative                                   Total Negative Charge
Charge
Sum of the                                       Sum of the Charges
Charges

NAME?                Symbol?     Symbol?        IODINE                      Sumbol?     Symbol?

# of protons                                    # of protons

# of neutrons          48           51          # of neutrons                 32          35
# of electrons         46           46          # of electrons

Atomic #                                        Atomic #

Atomic Mass                                     Atomic Mass
Total Positive                                  Total Positive Charge
Charge
Total Negative                                  Total Negative Charge
Charge
Sum of the                                      Sum of the Charges
Charges

 Name        # of       # of        # of     Atomic   Atomic      Total +     Total –   Total of
           Protons    Neutrons   electrons      #      Mass       Charge      Charge      ALL
                                                                                        Charges
  S2-
 Mg2+
  F-
 Al3+

								
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