CHEM 1100 Practice for Quiz 11 Dr. Stone Summer 2015 Name__

E= hυ υ = c/λ h = 6.626 x 10^{-34} J∗sec c = 2.997 x 10^{8} m/sec

29.9 ml = ounce 0.62 mile = km ih δ/δt ψ = ℜψ ΔxΔmv = h/4π

28.34 g = ounce π = 3.1416 λ = h/mv J = kgm^{2}/sec^{2}

1/λ = 1.097 x 10^{-2} nm-1( 1/m^{2} – 1/n^{2})

1. (2 points) Which of the following describes filling electronic energy levels from lowest to highest energy. (The lowest energy orbitals are filled first.)

a. Hund’s rule b. Heisenberg uncertainty principle c. Effective nuclear charge

d. Auf bau principle e. Strong nuclear force f. Weak electrical attraction

g. Pauli Exclusion principle

2. (2 points) Which of the following describes filling all of the orbitals that have the same energy with one electron before spin pairing electrons?

a. Hund’s rule b. Heisenberg uncertainty princip c. Effective nuclear charge

d. Auf bau principle e. Strong nuclear force f. Weak electrical attraction

g. Pauli Exclusion principle

3. (2 points) What is the uncertainty in the position of an electron that has a mass of

9.11 x 10^{-31} kg and its velocity is 2.2 x 10^{6} m/sec +/- 10%.

4. (2 points) The electron configuration for a lithium atom is: 1s^{2} 2s^{1}. What is the electron configuration for the following:

a. argon atom:

b. iron atom:

5. (2 points) Which orbital is lower in energy once it is filled with electrons? Circle the lowest energy orbital for each pair of orbitals:

3d or 3p 2s or 1s 2s or 2p 4s or 3d

6. (2 points) Write the principle quantum numbers for the last electron in a helium atom.

7. (2 points) How many electrons are in the outermost shell for each of the following atoms:

a. carbon_ b. helium__ c. sulfur_ d. sodium

8, (2 points) What atom in the second row is the smallest? Why is it the smallest?

9. (2 points) What is the effective nuclear charge for Fluorine?

10. (2 points) What is the effective nuclear charge for sodium?

Answers to Practice for Quiz 11