ELECTRON DOT CONFIGURATION (LEWIS DOT SYMBOLS):



Name: _______________________

Per: _______ Date: ____________

ELECTRON DOT CONFIGURATION (LEWIS DOT SYMBOLS):

1916, Lewis: Developed a system of arranging dots (representing valence electrons) around the symbols of the elements.

- The Symbol represents the Nucleus and Core Electrons for that Element.

- Dots represent the __________________________ .

Example: Write the electron dot symbol for phosphorus.

Answer: P = Phosphorus, Group 5A, therefore, there are 5 valence electrons.

[pic]

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Using Your Periodic Table, complete the table below.

|Name |Symbol |Atomic Number |Number of Valence Electrons |Lewis Dot Structure |

|1. Hydrogen |H |1 |1 |H· |

|2. Selenium | | | |[pic] |

|3. Oxygen |O | |6 | |

|4. Nitrogen | |7 | | |

|5. Potassium |K | | | |

|6. Calcium | | |2 | |

|7. Iron (III) | | |3 | |

|8. Copper (I) | | | |Cu· |

|9. Carbon |C | | | |

|10. Krypton | |36 | | |

|11. | |54 | | |

|12. Gold | | |2 | |

|Name |Symbol |Atomic Number |Number of Valence Electrons |Lewis Dot Structure |

|13. Astatine | | | | |

|14. | |86 | | |

|15. |Ag | |1 | |

|16. Iodine | | | | |

|17. Lithium | | | | |

|18. Arsenic | | | | |

|19. Boron | | | | |

|20. Argon | | | | |

|21. Beryllium | | | | |

|22. Francium | | | | |

|23. Lead (II) | | | | |

|24. Chlorine | | | | |

|25. Sodium | | | | |

Extra Credit (One point each)

|Name |Chemical Formula |Number of Valance Electrons |Lewis Dot Structure |

|Sodium chloride | | | |

|Potassium iodide | | | |

|Water | | | |

|Methane | | | |

|Fluorine gas | | | |

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