Q: According to the de Broglie relation, what is the wavelength of an electron (mass $$9.11 \times 10$$^{-31}$$\ \mathrm{kg}) $$moving at $$2.00 \times 10^6$\ \mathrm{m/s}$$?

$$3.64 \times 10$$^{-10}$$\ \mathrm{m}$$

Q: A sodium street lamp emits yellow light at $$589\ \mathrm{nm}. $$What is the energy of a single photon of this light? ($$h = 6.626 \times 10$$^{-34}$$\ \mathrm{J\cdot s}$$, $$c = 3.00 \times 10^8$\ \mathrm{m/s})$$

$$3.37 \times 10$$^{-19}$$\ \mathrm{J}$$

Q: A baseball (mass $$0.145\ \mathrm{kg}) is $$thrown at $$40.0\ \mathrm{m/s}. $$Calculate its de Broglie wavelength.

$$1.14 \times 10$$^{-34}$$\ \mathrm{m}$$

Question 1

Which of the following best explains why ultraviolet light is more dangerous to human tissue than visible light?

Accepted Answer

Ultraviolet light has a shorter wavelength and therefore higher energy than visible light.

Question 2

According to the de Broglie relation, what is the wavelength of an electron (mass $$9.11 	imes 10$$^{-31}$$\ \mathrm{kg}) $$moving at $$2.00 	imes 10^6$\ \mathrm{m/s}$$?

Accepted Answer

$$3.64 	imes 10$$^{-10}$$\ \mathrm{m}$$

Question 3

Which experiment provided evidence for the particle nature of light?

Accepted Answer

Photoelectric effect

Question 4

A hydrogen atom electron transitions from $$n=4 to$$ $$n=2. $$What is the wavelength of the emitted photon? (Use $$R_H = 1.097 	imes 10^7$\ \mathrm{m}^{-1})$$

Accepted Answer

$$486\ \mathrm{nm}$$

Question 5

Which statement best describes the Heisenberg Uncertainty Principle?

Accepted Answer

The product of the uncertainties in position and momentum of a particle is always greater than or equal to $$\dfrac{h}{4\pi}.$$

Question 6

Which of the following correctly lists the order of increasing energy for electromagnetic radiation?

Accepted Answer

Radio waves \u003c Infrared \u003c Visible light \u003c Ultraviolet \u003c X-rays

Question 7

Which quantum number determines the shape of an atomic orbital?

Accepted Answer

Angular momentum quantum number ($$l)$$

Question 8

A sodium street lamp emits yellow light at $$589\ \mathrm{nm}. $$What is the energy of a single photon of this light? ($$h = 6.626 	imes 10$$^{-34}$$\ \mathrm{J\cdot s}$$, $$c = 3.00 	imes 10^8$\ \mathrm{m/s})$$

Accepted Answer

$$3.37 	imes 10$$^{-19}$$\ \mathrm{J}$$

Question 9

Which of the following best describes the difference between constructive and destructive interference?

Accepted Answer

Constructive interference results in increased amplitude, destructive in decreased amplitude.

Question 10

Which statement about atomic emission spectra is correct?

Accepted Answer

Each element emits a unique line spectrum corresponding to specific electron transitions.

Question 11

What is the maximum number of electrons that can occupy the $$3d$$ subshell?

Accepted Answer

10

Question 12

Which of the following is a consequence of the wave-particle duality of electrons?

Accepted Answer

Electron beams can produce diffraction patterns similar to light.

Question 13

If the principal quantum number $$n=3$$, how many possible values of the angular momentum quantum number $$l$$ are there?

Accepted Answer

3

Question 14

Which of the following transitions in the hydrogen atom emits the photon with the highest energy?

Accepted Answer

$$n=2 to$$ $$n=1$$

Question 15

Which property of light is directly proportional to its energy?

Accepted Answer

Frequency

Question 16

Which of the following best describes the shape of a $$p$$ orbital?

Accepted Answer

Dumbbell-shaped with two lobes

Question 17

A baseball (mass $$0.145\ \mathrm{kg}) is $$thrown at $$40.0\ \mathrm{m/s}. $$Calculate its de Broglie wavelength.

Accepted Answer

$$1.14 	imes 10$$^{-34}$$\ \mathrm{m}$$

Question 18

Which statement about the Bohr model of the hydrogen atom is correct?

Accepted Answer

Electrons travel in fixed orbits with quantized energies and emit photons when transitioning between orbits.

Question 19

Which of the following is NOT a possible set of quantum numbers for an electron in a $$3p$$ orbital?

Accepted Answer

$$n=3$$, $$l=2$$, $$m_l=0$$

Chapter 2: Quantum Theory

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