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READING GUIDE: 5.1 – Revising the Atomic Model (p. 128-133)
Atomic Theory and Electrons
1) Summarize the contributions of each of the following individuals to our understanding of the atom and
atomic structure (you may have to look back into CH 4 for the first 3…or the summary on page 133).
Include a sketch of what the atom would look like according to their explanations.
• Dalton:
• Thomson:
• Rutherford:
• Bohr:
• Shrodinger:
2) How did Bohr’s model of the atom differ from Rutherford’s? (hint: think electrons!)
3) Describe how the quantum theory of atomic structure differs from Bohr’s theory. (hint: think electrons
again!)
4) How many energy SUBLEVELS are in each of the following principal energy levels? What types of
sublevels are they? Complete the chart below:
Principal Energy Level:
Number of sublevels:
Type of Sublevel:
n=1
n=2
n=3
n=4
5) Complete the following chart summarizing the different orbitals:
ORBITAL NAME
NUMBER OF ORBITALS
MAXIUM NUMBER OF
ELECTRONS
s
p
d
f
6) How many orbitals (and therefore how many electrons) are in the following sublevels?
Energy sublevel:
# of orbitals:
# of electrons:
3p sublevel
2s sublevel
4f sublevel
4p sublevel
3d sublevel
5d sublevel
1s sublevel
2p sublevel
7) Draw the 2s and 2px and 2py orbitals.
8) How can electrons in an atom move from one energy level to a HIGHER energy level?
9) How can electrons in an atom move from one energy level to a LOWER energy level?