1. QQ:
List the names, charges, & locations of 3 kinds of particles that make up an atom. Who first discovered each of these?
What does an electron
cloud represent?
3. How might an electric
fan that is turned on be
a model of an atom?
How is unlike an atom?

3. Today’s Objective:
I can use Bohr models to represent elements of specific atoms.

4. 97.5%
Zinc
95% Cu

5. Electron Configuration
* how electrons are arranged

6. Orbital Region where there is 90% probability of finding an electron.
Can’t pinpoint the location of an electron.
Density of dots represents degree of probability.

7. * How much energy each electron contains
Energy Levels
* How much energy each electron contains
High
Low

8. Ground State: least energy & most stable
Excited State: gained energy
& moved out; Less stable

9. The outer energy level of each orbit strives to be filled
The outer energy level of each orbit strives to be filled. The outer energy level is most stable when they have 8 electrons.

10. Energy level
# electrons 1 2 8 3 18 4 32
2n2

11. Valence Electron
* Outer most shell
* Most likely to react

12. Valence electrons

13. Bohr-ring Practice

15. Create a Bohr Model of Hydrogen

21. Create a
Bohr Model
Of Oxygen.

22. Bohr Model
Of Oxygen.

24. Work on your news article. Remember: Newspaper format
Scientist & His Discovery
Year of Discovery
Previous Theories
Picture
Quality of Product
New Information
15 min

25. Ima Student Wonderful Worker Brilliant Believer Article #
Average Score:
Exceeds
Expectation
3 points
Meets
2 points
Needs
Improvement
1 point
Not
Seen
0 points
Looks like
a paper
It is clear what scientist is being discussed
Year of discovery
Scientist’s discovery is accurately described
It is clear how this new theory is different from previous theories
Appropriate picture is present
Contains info not presented in class
Quality of project
Positive comment:
Wish for next time:
Ima Student
Wonderful Worker
Brilliant Believer

27. What happened to the beam when Thomson placed a magnet on either side of the glass tube? What did he discover?
Beam was attracted to positive magnet. Electron

28. Atoms of the same element that have a different
What are isotopes?
Atoms of the same element that have a different
number of neutrons.

29. Gold foil experiment to discovered proton in nucleus.
What experiment did Rutherford complete and what did he contribute to current atomic theory?
Gold foil experiment to discovered proton in nucleus.

30. 6 protons, 6 electrons, 8 neutrons.
If an atom has an atomic number of 6 and a mass number of 14, how many protons, electrons, and neutrons are in the atom?
6 protons, 6 electrons, 8 neutrons.

31. What did Aristotle believe all matter was made of?

32. What is the charge of an atom with 15 protons, 16 neutrons, and 18 electrons.
Negative 3

33. This is the first scientist that understood that atoms could be combined to form molecules.
John Dalton

34. What happens to an electron when it gains energy?
It moves further
away from nucleus.

35. This scientist discovered the relationship between
the energy an electron
contains and where it can be found in relation to the nucleus.
Bohr