Honors Chemistry Assignment Sheet With Answer Key - Unit 3
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Honors Chemistry
Honors Chemistry Assignment Sheet- Unit 3
Extra Learning Objectives
(beyond regular chem.):
1.
Related to electron configurations:
a.
Be able to write orbital notations for s, p, & d block elements.
b. Be able to explain the concepts behind electron configurations.
2.
Related to Periodic Trends:
a.
Be able to explain & use the concept of second ionization energy
b. Be able to explain & use the concept of atomic radii as related to ions
Assignments (Due class before Unit 3 Test)
1.
Electron Configurations (Use your book)
Read Section 4-3 in your book
Review practice problem 4-1 for an explanation (pg 107)
Do Section Review Questions # 4 & # 5 (pg 116)
Do Chap Review Questions #18, 19, 20, 21, 23, 25, & 43 (pg 118-120)
2.
Periodic Trends (use your book & internet resources)
See below
Honors Assign #1-Electron Configuration
4.
Element
C
Ne
S
2
2
2
2
2
6
2
2
6
2
4
e.
1s
2s
2p
1s
2s
2p
1s
2s
2p
3s
3p
config.
2
2
2
6
2
4
Noble
[He] 2s
2p
[He] 2s
2p
[Ne] 3s
3p
gas
Orbital
notation
5.
Identify the elements having the following electron configurations:
2
2
6
2
3
a.
1s
2s
2p
3s
3p
P
1
b. [Ar] 4s
K
c. Contains four electrons in its third and outer main energy level.
Si
d. Contains one set of paired and three unpaired electrons in its fourth and outer main energy level.
As
18.
a. In your own words, state the Aufbau principle.
An electron occupies the lowest-energy orbital that can receive it.
b. Explain the meaning of this principle in terms of an atom with many electrons.
In a multi-electron atom, the lowest-energy orbital is filled first (ex 1s). Electrons are then added
to the orbital with the next lowest energy, and so on, until all of the electrons in the atom have been
placed in orbitals.
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