Valence Electrons
As you go through the PowerPoint,
answer the questions on your paper.
• Make a section labeled REVIEW VIDEO.
• As you watch the video, draw the example
Bohr models.
• Click the link below to watch the video.
http://youtu.be/iih6rJ2S6pk
Label the next section POWERPOINT
QUESTIONS.
Thinking about Bohr Models…
1.How many electrons can go on the first ring?
2.How many electrons can go on the second
ring?
3.How many electrons can go on the third ring?
4. How many protons does lithium have?
5. How many neutrons?
6. How many electrons?
7. Draw the Bohr model for lithium.
Use the picture below to check your
answers to #7.
If your Bohr model is
wrong…go back and
change it now!
VALENCE = OUTSIDE
Lithium has 3 total
electrons but only
1 VALENCE
ELECTRON.
Valence electron
Let’s practice…
8. How many valence electrons?
• Did you get 6?
9. How many valence electrons?
10. How many valence electrons?
11. How many valence electrons?
12. Work out the Bohr model for
magnesium and draw it on your paper.
13. How many valence electrons
do you have on your model of
magnesium?
Label this section ELECTRON DOT
DIAGRAMS.
• Make sure you draw the example!
• Click the link below to watch the video
• http://youtu.be/y6QZRBIO0-o
14. Draw the dot diagram for
hydrogen.
15. Draw the dot diagram for helium.
16. Draw the dot diagram for lithium.
17. Draw the dot diagram for sodium.
18. Draw the dot diagram for
magnesium.
19. Draw the dot diagram for fluorine.
20. Draw the dot diagram for argon.