Q: A laser emits light with a wavelength of $$337\ \mathrm{nm}. $$What is the frequency of this light? (Speed of light $$c = 3.00 \times 10^8$\ \mathrm{m/s})$$

$$8.90 \times 10$$^{14}$$\ \mathrm{Hz}$$

Q: A photon of light has a frequency of $$6.0 \times 10$$^{14}$$\ \mathrm{Hz}. $$What is its energy? (Planck's constant $$h = 6.626 \times 10$$^{-34}$$\ \mathrm{J\cdot s})$$

$$3.98 \times 10$$^{-19}$$\ \mathrm{J}$$

Question 1

Which of the following types of electromagnetic radiation has the highest energy per photon?

Accepted Answer

Gamma rays

Question 2

A hospital uses gamma radiation to treat cancer. What property of gamma rays makes them effective for this purpose?

Accepted Answer

They can ionize atoms and molecules, damaging fast-replicating cells

Question 3

Which of the following correctly lists the regions of the electromagnetic spectrum in order of increasing wavelength?

Accepted Answer

X-ray \u003c visible \u003c infrared

Question 4

A laser emits light with a wavelength of $$337\ \mathrm{nm}. $$What is the frequency of this light? (Speed of light $$c = 3.00 	imes 10^8$\ \mathrm{m/s})$$

Accepted Answer

$$8.90 	imes 10$$^{14}$$\ \mathrm{Hz}$$

Question 5

Which quantum number determines the shape of an atomic orbital?

Accepted Answer

Angular momentum quantum number ($$\ell)$$

Question 6

How many orbitals are present in the $$n=3$$ principal energy level of an atom?

Accepted Answer

9

Question 7

Which of the following sets of quantum numbers is NOT allowed for an electron in an atom?

Accepted Answer

$$n=2,\ \ell=2,\ m_\ell=0$$

Question 8

A night vision camera detects infrared radiation. Which statement best explains why?

Accepted Answer

Infrared radiation is emitted as heat from warm objects, including human bodies

Question 9

According to the Bohr model, what happens when an electron in a hydrogen atom jumps from $$n=3 to$$ $$n=2$$?

Accepted Answer

The atom emits a photon of light

Question 10

Which of the following best describes the concept of complementary properties in quantum mechanics?

Accepted Answer

Observing the wave nature of an electron prevents simultaneous observation of its particle nature

Question 11

A photon of light has a frequency of $$6.0 	imes 10$$^{14}$$\ \mathrm{Hz}. $$What is its energy? (Planck's constant $$h = 6.626 	imes 10$$^{-34}$$\ \mathrm{J\cdot s})$$

Accepted Answer

$$3.98 	imes 10$$^{-19}$$\ \mathrm{J}$$

Question 12

Which of the following statements about atomic emission spectra is correct?

Accepted Answer

Each element has a unique set of discrete bright lines at specific wavelengths

Question 13

How many $$d$$ orbitals are present in the $$n=5$$ principal energy level?

Accepted Answer

5

Question 14

Which of the following best explains why X-rays can be used to image bones inside the human body?

Accepted Answer

X-rays have enough energy to pass through soft tissue but are absorbed by denser bone material

Question 15

Which of the following is a correct statement about the relationship between wavelength, frequency, and energy of electromagnetic radiation?

Accepted Answer

As wavelength increases, frequency decreases and energy decreases

Question 16

A certain color of visible light has a wavelength of $$500\ \mathrm{nm}. $$What is the energy of a single photon of this light? ($$c = 3.00 	imes 10^8$\ \mathrm{m/s}$$, $$h = 6.626 	imes 10$$^{-34}$$\ \mathrm{J\cdot s})$$

Accepted Answer

$$4.14 	imes 10$$^{-19}$$\ \mathrm{J}$$

Question 17

Which of the following best describes constructive interference?

Accepted Answer

Waves align so that their crests overlap, resulting in a wave with greater amplitude

Question 18

How many possible values of the magnetic quantum number $$m_\ell$$ are there for $$\ell = 2$$?

Accepted Answer

5

Question 19

Which of the following is a real-world example of the wave-particle duality of electrons?

Accepted Answer

Electrons producing an interference pattern when passed through two closely spaced slits

Question 20

Which quantum number specifies the orientation of an orbital in space?

Accepted Answer

Magnetic quantum number ($$m_\ell)$$

Quantum-Mechanical Model of the Atom

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