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# Orbital Shapes and Energies (College)

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## Orbital Shapes and Energies

1.
Which of the following defines an orbital?
1. The surface containing 80% of the total electron probability
2. The surface containing 76% of the total electron probability
3. The surface containing 90% of the total electron probability
4. The surface containing 50% of the total electron probability

2.
Which of the following has a spherical shape?
1. s
2. d
3. p
4. f
3.
Which of the following combinations of n, l, and $m_l$ could lead to the orbital shown?
1. $n=2, l=1, m_l=-1, 0, 1$
2. $n=3, l=0, m_l=0$
3. $n=4, l=2, m_l=-2$
4. None of the above

4.
Where do p orbitals lie?
1. on the x-axis, only
2. on the y-axis, only
3. on the x-axis, y-axis, and z-axis
4. on the z-axis, only
5.
Which of the following represents the shape of p orbitals?
1. rings
2. lobes
3. spherical structures
4. a variety of shapes

6.
How many p orbitals exist?
1. 3
2. 6
3. 12
4. 5
7.
Which combination of n, l, and $m_l$ values could represent the orbital shown?
1. n=2, l=0, $m_l$=0
2. n=2, l=1, $m_l=-1$
3. n=2, l=1, $m_l=0$
4. n=2, l=1, $m_l=1$

8.
How many d orbitals exist?
1. 2.5
2. 5
3. 10
4. 3
9.
Which of the following d-orbitals has the structure shown? (Ignore the label shown in the diagram.)
1. $d_{xz}$
2. $d_{x^2 - y^2}$
3. $d_{z^2}$
4. $d_{xy}$

10.
How many f orbitals exist?
1. 14
2. 3.5
3. 3
4. 7
11.
Which of the following represents the lowest combination of n and l values in which the following orbital can exist?
1. n=3 and l=2
2. n=4 and l=2
3. n=1 and l=0
4. n=4 and l=3

12.
Which combination of n, l, and $m_l$ values could represent the orbital shown?
1. n=3, l=2, and $m_l=-2$
2. n=3, l=0, and l=0
3. n=4, l=3, and $m_l=3$
4. n=4, l=1, and $m_l=-1$
13.
Two orbitals with the same value of n for an atom of hydrogen are called                                             .

14.
The five possible d orbitals are $d_{xz} , d_{xy}, d_{yz}, d_{x^2-y^2}, and d_{z^2}$.
1. True
2. False
15.
Name all of the possible values of n and l for the orbital that is shown.

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