1. Dot Structures

2. Which sublevel consists of 5 orbitalsp d f

3. Which sublevel is made of dumbbell shaped orbitals?

4. How many electrons fill the f orbitals2 6 10 14

5. How many electrons fill the 3rd main energy level?2 8 18 32

6. What is the correct electron configuration for P
1s22s22p63s23p6
1s22s22p63s23p4
1s22s22p63s2
1s22s22p63s23p3

7. What is the correct end configuration for Ba

8. Excited Configurations
When electrons are in the excited state, their configuration will look different
Ne ground s22s22p6
excited s22s12p63s1 or
1s22s22p43p2

9. Valence Electrons Electrons in the last main energy level
These are the electrons farthest out on the atom
These will interact with other atoms
These are the electrons involved in chemical reactions
There are a maximum of 8 valence electrons

10. How to find valence e-
Write configuration and count electrons in last main energy level
Examples: Find valence electrons for C

11. How many valence electrons does P have?

12. How many valence electrons does K have?

13. How many valence electrons does Fe have?

14. How many valence electrons does Kr have?

15. How many valence electrons does Mn have?

16. Dot Structure Shows valence electrons
Dots are placed around the symbol of the element
Max of two dots per side
Must have at least one dot per side before doubling up

17. Draw Dot Structure C Fe Cl