CP Chemistry Worksheet: Ions



1) What is an ion?______Electrons different than protons_____________________

Complete the following:

1. For each of the positive ions listed in column 1, use the periodic table to find in column 2 the total number of electrons that ion contains. The same answer may be used more than once.

__B__ 1. Al+3 A. 2

___D_ 2. Fe+3 B. 10

_B___ 3. Mg+2 C. 21

__H__ 4. Sn+2 D. 23

_F___ 5. Co+2 E. 24

__E__ 6. Co+3 F. 25

__A__ 7. Li+1 G. 36

__C__ 8. Cr+3 H. 48

__G__ 9. Rb+1 I. 76

__I__ 10. Pt+2 J. 81

2. For each of the following ions, indicate the total number of protons and electrons in the ion.

|Ion |Number of Protons |Number of Electrons |

|Co+2 |27 |25 |

|Co+3 |27 |24 |

|Cl-1 |17 |18 |

|K+1 |19 |18 |

|S-2 |16 |18 |

|Sr+2 |38 |36 |

|Al+3 |13 |10 |

|P-3 |15 |18 |

3. How many protons, neutrons, and electrons are present in the 59Ni+2 ion?

P: 28 N: 31 E: 26 28

4. How many protons, neutrons, and electrons are present in the 91Zr+4 ion?

P: 40 N: 51 E: 36 40

5. How many protons, neutrons, and electrons are present in the Carbon-20 isotope?

P: 6 N: 14 E: 6

6. How many protons, neutrons, and electrons are present in the Lithium-7 isotope?

P: 3 N: 4 E: 3

7. How many protons, neutrons, and electrons are present in the 13C-4 ion?

P: 6 N: 7 E: 10 6

8. Write the complete chemical symbol for the ion with 84 protons, 125 neutrons, and 80 electrons.

Po: 84 on bottom left 209 top left +4 top right

9. Write the complete chemical symbol for the ion with 27 protons, 32 neutrons, and 25 electrons.

Co: 27 bottom left 59 top left +2 top right

10. Write the complete chemical symbol for the ion with 73 protons, 108 neutrons, and 68 electrons.

Ta: 73 bottom left 181 top left +5 top right

11. Write the complete chemical symbol for the ion with 31 protons, 39 neutrons, and 28 electrons.

Ga: 31 bottom left 70 top left +3 top right

|Name of Element |Element Symbol | |Atomic | | | |

| | |Mass Number |Number |Protons |Neutrons |Electrons |

|Boron |B |11 |5 |5 |6 |5 |

|Sodium |Na |24 |11 |11 |13 |11 |

|Gallium |Ga |68 |31 |31 |37 |31 |

|Yttrium |Y |89 |39 |39 |128 |39 |

|Copper |Cu |64 |29 |29 |35 |29 |

|Technetium |Tc |98 |43 |43 |55 |43 |

|Lead |Pb |207 |82 |82 |125 |82 |

|Ytterbium |Y |173 |70 |70 |103 |70 |

|Actinium |Ac |227 |89 |89 |188 |89 |

|Molybdenum |Mo |96 |42 |42 |54 |42 |

|Thallium |Ti |204 |81 |81 |123 |81 |

|Fermium |Fm |257 |100 |100 |157 |100 |

|Nobelium |No |259 |102 |102 |157 |102 |

|Hydrogen |H |1 |1 |1 |0 |1 |

|Carbon |C |12 |6 |6 |6 |6 |

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