Chemistry Worksheet

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Name: _____________________________ Block: ______
Chemistry I
1. Compare the energy of an electron in the ground state and an electron in the excited state.
Electrons in the ground state have their lowest possible energy; in an excited state an electron has excess
energy
2. When an electron falls from a higher energy level to a lower energy level, how is the energy released?
In the form of electromagnetic waves (light)
3. What is the difference between the previous models of the atom and the modern quantum mechanical
model?
The quantum model does not require the electrons to be in specific energy levels; the energy
levels are just the most probable location for the electrons
4. The further the electron is from the nucleus, the
more
energy the electron has.
5. A(n)
energy level
is often thought of as a region of space in which there is a high probability of finding
an electron.
6. Determine the type of electromagnetic wave created in each of the given energy level transitions (if
visible light, then put the exact color):
a. n = 6 to n = 2
Violet
b. n = 3 to n = 1
UV
c. n = 4 to n = 2
Blue
7. How many electrons can each of the following orbitals hold?
a. 2s =
2
b. 3p =
6
c. 6d =
10
d. 5f =
14
rd
8. What is the maximum number of electrons in the 3
principle energy level?
18
9. Using arrows, show how the following orbitals will fill with electrons.
Electron Configuration
1s
2s
2p
3s
3p
4s
3d
2
2
6
2
1s
2s
2p
3s
Mg
2
2
6
2
2
Si
1s
2s
2p
3s
3p
2
2
6
2
6
2
2
Ti
1s
2s
2p
3s
3p
4s
3d
10. Write the complete electron configuration for each atom on the blank line.
2
2
2
2
2
6
2
4
2
8
1s
2s
2p
1s
2s
2p
3s
3p
a. Carbon
b. Sulfur
c. Nickel
[Ar] 4s
3d
1
d. Rubidium
[Kr] 5s
11. What elements are represented by each of the following electron configurations?
2
2
5
2
2
6
2
6
2
10
6
2
10
4
a. 1s
2s
2p
F
c. 1s
2s
2p
3s
3p
4s
3d
4p
5s
4d
5p
Te
2
2
6
2
6
2
2
2
6
2
6
2
10
5
b. 1s
2s
2p
3s
3p
4s
Ca
d. 1s
2s
2p
3s
3p
4s
3d
4p
Br
12. a. What are valence electrons?
Electrons in the outermost energy level
b. List the number of valence electrons for the following atoms:

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