Section 5.1 In Class Practice- Orbitals
1. How many orbitals are present in each of the following sublevels:
a) 3d
b) 4s
c) 4f
d) 2p
e) 3s
f) 1s
g) 3p
h) 2s
2. For each of the following elements, indicate the principle energy level, the sublevel, and the number of electrons in the outermost energy sublevel.
a) C
b) Mg
c) Ba
d) Ne
e) Ar
f) Cu
g) Fe
h) I
In Class Practice- Section 5.2- Electron Configurations
1. For each of the following elements, fill out the orbital diagrams provided:
a) Phosphorus (P)
b) Xenon (Xe)
c) Zinc (Zn)
2. Fill out the following chart:
Element
Full Electron
Configuration
Sc
P
He
B
C
N
F
Br
Shorthand Electron
Configuration
# of valence electrons
Orbital diagram of
valence and d orbitals
# of unpaired electrons
Section 5.3 In Class Practice
Wavelength, Frequency calculations1. Solve the following problems using the equations provided. Make sure you show your work, include all units, and box or highlight answers.
cc= 3.00 X 108 m/s
E = h
h= 6.626 x 10-34 J*s
1Hz = 1/s
1 m = 1 x 109 nm
a) What is the energy of a photon whose frequency is 7.0 X 1011 Hz?
b) Calculate  for a = 200 nm. (Hint: pay attention to units! If c is in units of m/s, then all lengths must be in meters!)
c) Calculate for  = 900 nm. (Hint: Look back a hint in b)
d) Calculate the energy for each wavelength in b and c.
e) Which wavelength has the greatest frequency? Which wavelength has more energy?
2. For each of the following, indicate whether the electron configuration given is ground state or excited state. For those that are excited state,
re-write the electron configuration in the ground state for that number of electrons.
a.
b.
c.
d.
e.
f.
1s22s22p6 3s23p4
1s22s22p63s23p6 5s2
1s23s2
1s22s22p63s23p64s25p6
1s24s2
1s22s22p63s23p63d8
Optional: Quantum Numbers
Principle quantum
Angular Quantum
Magnetic quantum
Spin Quantum number
number (n)
number (l)
number (m)
(s)
1
2
3
Element
Electron configuration
Quantum numbers of valence
electrons
2 2
6 1
A. Sodium
1s 2s 2p 3s (valence electrons in (3, 0, 0, +1/2) OR (3, 0, 0, -1/2)
bold and italics)
B. Potassium
C. Carbon
D. Magnesium
E. Phosphorus