1. The Quantum-Mechanical Model of the Atom
Chemistry: A Molecular Approach, 1st Edition
Nivaldo J. Tro
Chapter 7
The Quantum-Mechanical Model of the Atom

2. Tro Chemistry: A Molecular Approach
Determine the wavelength (in nm) of an X-ray with a frequency of 4.2 x 1018 Hz.
7.1 x 10–11
7.1 x 10–2
1.3 x 1027
1.4 x 1010
7.1 x 10–18
Tro Chemistry: A Molecular Approach

3. Tro Chemistry: A Molecular Approach
Determine the wavelength (in nm) of an X-ray with a frequency of 4.2 x 1018 Hz.
7.1 x 10–11
7.1 x 10–2
1.3 x 1027
1.4 x 1010
7.1 x 10–18
Tro Chemistry: A Molecular Approach

4. Tro Chemistry: A Molecular Approach
A major league pitcher throws a g baseball at a speed of 92.5 mph (41.4 m/s). What is the de Broglie wavelength of the baseball in meters?
4.81 x 10–38
4.81 x 10– 41
1.08 x 10– 34
1.08 x 10– 37
1.08 x 10– 40
Tro Chemistry: A Molecular Approach

5. Tro Chemistry: A Molecular Approach
A major league pitcher throws a g baseball at a speed of 92.5 mph (41.4 m/s). What is the de Broglie wavelength of the baseball in meters?
4.81 x 10–38
4.81 x 10– 41
1.08 x 10– 34
1.08 x 10– 37
1.08 x 10– 40
Tro Chemistry: A Molecular Approach

6. Tro Chemistry: A Molecular Approach
An electron in a hydrogen atom in the n = 6 energy level emits kJ/ mol of energy in a transition to a lower energy level. To what energy level does the electron fall? 1 2 3 4 5
Tro Chemistry: A Molecular Approach

7. Tro Chemistry: A Molecular Approach
An electron in a hydrogen atom in the n = 6 energy level emits kJ/ mol of energy in a transition to a lower energy level. To what energy level does the electron fall? 1 2 3 4 5
Tro Chemistry: A Molecular Approach

8. Tro Chemistry: A Molecular Approach
Which of the following transitions for an electron in a hydrogen atom would release the largest quantum of energy?
n = 3 → n = 1
n = 4 → n = 3
n = 1 → n = 4
n = 2 → n = 1
Tro Chemistry: A Molecular Approach

9. Tro Chemistry: A Molecular Approach
Which of the following transitions for an electron in a hydrogen atom would release the largest quantum of energy?
n = 3 → n = 1
n = 4 → n = 3
n = 1 → n = 4
n = 2 → n = 1
Tro Chemistry: A Molecular Approach

10. Which of the following is NOT an allowed set of quantum numbers?
n = 4 l = 3 ml = 3
n = 1 l = 0 ml = 0
n = 5 l = 4 ml = – 2
n = 2 l = 1 ml = 0
n = 3 l = 3 ml = – 2
Tro Chemistry: A Molecular Approach

11. Which of the following is NOT an allowed set of quantum numbers?
n = 4 l = 3 ml = 3
n = 1 l = 0 ml = 0
n = 5 l = 4 ml = – 2
n = 2 l = 1 ml = 0
n = 3 l = 3 ml = – 2
Tro Chemistry: A Molecular Approach