1. Which scientist developed the quantum mechanical model of the atom?
A.) Bohr
B.) Rutherford
C.) Schrodinger
D.) Heisenberg

2. Draw a wave that shows low energy and gradually changes to high energy
Draw a wave that shows low energy and gradually changes to high energy. Label the following on your wave: Crest Trough Amplitude Wavelength

3. Which of the following orbitals has the lowest energy?4p 4s 3d 4f

4. The formula 2n2 represents _________.
The number of sublevels in any energy level
The maximum number of electrons that can occupy an energy level
The number of orbitals
None of the above

5. What type of atomic orbitals are in the third energy level?
p and d only
s, p, d, and f
s and p only
s, p, and d only

6. The quantum mechanical model of the atom_______.
Was proposed by Hund
Defines the exact path of an electron
Is concerned with the probability of finding an electron in a certain position
Was proposed by Bohr

7. What is the maximum number of d orbitals in a principal energy level?5 10 7 2

8. Write the complete electron configuration for titanium.

9. The principal quantum number indicates what property of an electron?
Speed
Orbital shape
Spin
Energy level

10. Which one of the following electron configurations is most stable?
5s1 4d5
5s3 4d3
5s2 4d4
5s4 4d2

11. What color of visible light has the shortest wavelength?
Blue
Green
Yellow
Orange

12. Draw the orbital diagram for silicon.

13. What are quanta of light called?
Charms
Excitons
Photons
Orbitals

14. The atomic emission spectra of a sodium atom on earth and of a sodium atom in the sun would be _______.
The same
The same as each other only in UV range
The same as those of several other elements
Different from each other

15. A wave has wavelength= 5.80 x 102 nm
Convert this wavelength to centimeters.

16. The lowest energy state of an atom is called the ______.
Excited state
Dependent state
Independent state
Ground state

17. What is the approximate energy of a photon having a frequency of 4
What is the approximate energy of a photon having a frequency of 4.0 x 107 Hz ?

18. What is the approximate frequency of a photon having an energy of 5
What is the approximate frequency of a photon having an energy of 5.25 x J ?

19. What is the difference between a 2s and a 3s orbital?
There is no difference
More electrons can occupy a 3s
The 3s is larger in volume and a greater distance from the nucleus than a 2s

20. Write Noble gas configurations for the following elements:
Nb (41)
At (85)
Ag (47)
Cm (96)

21. ANSWERS Nb (41) [Kr] 5s2 4d3 At (85) [Xe] 6s2 4f14 5d10 6p5
Ag (47) [Kr] 5s1 4d10
Cm (96) [Rn] 7s2 5f8

22. What is the probability of finding an electron within the region of the electron cloud?
50%
75%
90%
100%

23. What is the next atomic orbital in the series 1s, 2s, 2p, 3s, 3p, 4s?2d 2f 3d 4s

24. What is the correct number of electrons in the outermost energy level of an oxygen atom?2 4 6 8

25. Which of the following states that no more than two electrons can occupy an atomic orbital and that two electrons in the same orbital must have opposite spins?
Hund’s rule
Pauli exclusion principle
Dalton’s theory
Aufbau principle

26. Which electron configuration of the 4f energy sublevel is the most stable?

27. A wave has wavelength= 5.80 x 10-7 m
Convert this wavelength to nanometers.

28. Which of the following electromagnetic waves have the highest frequencies?
ultraviolet light waves
X-rays
Microwaves
Gamma rays

29. How do the energy differences between the higher energy levels of an atom compare with the energy differences between the lower energy levels of the atom?
They are greater in magnitude.
They are smaller in magnitude.
There is no significant difference in the magnitudes of these differences.

30. Things to know…….. Principles of electron configurations
Explanation for discrete lines in atomic emission spectra
You will be given c and h as well as a periodic table.
Hydrogen’s spectrum and series of lines

31. Suggested Book Problems
Pg ,25,27,29,30,31,33,35,37,39,40,41, 44,49,50,55,58,59,61,63,65,68