Part A: Atomic Structure + Protons Neutrons - Electrons

5. What element is represented by the diagram? ____________ Boron Soaps Glass Manufacturing Flare Guns Ceramics Fiberglass

Part B: Atomic Calculations 6. Label the information provided in the periodic table. Atomic Number 8 O Symbol Name Oxygen 15.999 Atomic Mass

7.What does the atomic number represent? Protons Electrons

What does the atomic mass represent? Protons + Neutrons Atomic Mass

9. How would you figure the number of protons or electrons in an atom? USE THE ATOMIC NUMBER Atomic Number 8

10. How would you figure the number of neutrons in an atom? SUBTRACT THE ATOMIC NUMBER FROM THE ATOMIC MASS Atomic Number 8 15.999 Atomic Mass

11. Use your knowledge of atomic calculations to complete the chart. Element Atomic Number Atomic mass Protons + Neutrons Protons Neutrons Atomic Mass – Atomic # Electrons Li 3 7 P 15 31 Cl 35 17 Ni 28 K 39 19 Ag 47 61 H 1 Si 14 W 74 110 Ne 10 3 4 3 15 16 15 17 18 17 28 59 28 19 19 20 108 47 47 1 1 14 28 14 74 184 74 10 20 10

Part C: Electron Configuration 12. How many electrons can each level hold? 1st = 2nd = 3rd = 2 8 18

13. What term is used for the electrons in the outermost shell or energy level? VALENCE

Scientists use two types of diagrams to show the electron configuration for atoms. Bohr Diagram Lewis Structure

Sulfur Atomic # = 16 Atomic Mass = 32 Protons = Neutrons = Electron = Bohr Diagram Shows all electrons 16 16 16

Shows valence electrons Lewis Structure Shows valence electrons Sulfur Atomic # = 16 Atomic Mass = 32 Protons = 16 Neutrons = 16 Electron = 16 S

Li Li 3 4 3 Atomic Number 3 Mass Number 7 Number of Protons Number of Neutrons Number of Electrons 3 4 3 Li

Ne Ne 10 10 10 Atomic Number 10 Mass Number 20 Number of Protons Number of Neutrons Number of Electrons 10 10 10 Ne

Mg Mg 12 12 12 Atomic Number 12 Mass Number 24 Number of Protons Number of Neutrons Number of Electrons 12 12 12 Mg

Cl Cl 17 18 17 Atomic Number 17 Mass Number 35 Number of Protons Number of Neutrons Number of Electrons 17 18 17 Cl

He He 2 2 2 Atomic Number 2 Mass Number 4 Number of Protons Number of Neutrons Number of Electrons 2 2 2 He

Si Si 14 14 14 Atomic Number 14 Mass Number 28 Number of Protons Number of Neutrons Number of Electrons 14 14 14 Si

(1) Which elements had a filled outermost shell (1) Which elements had a filled outermost shell? (2) Which element would be most likely to lose electrons in a chemical bond? (3) Which element would be most likely to gain electrons in a chemical bond? (4) Which elements are not likely to bond with other elements? Why? He & Ne Li (Only has 1 valence electron) Cl (Only needs 1 more electron to fill its outer shell) He & Ne They have full outer shells.

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