2. Part A: Atomic Structure+
Protons
Neutrons -
Electrons

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

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

5. 7.What does the atomic number represent?
Protons
Electrons

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

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

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

9. 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

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

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

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

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

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

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

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

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

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

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

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

21. (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.

22. Build an Atom