Question 1

Which of the following best describes the main insight from Schrödinger's Cat thought experiment in the context of quantum mechanics?

Accepted Answer

It shows that the quantum strangeness of superposition does not directly translate to the macroscopic world.

Question 2

A sodium vapor lamp emits yellow light with a wavelength of 589 nm. What is the frequency of this light? (Speed of light $$c = 3.00 	imes 10^8$ m/s)

Accepted Answer

$$5.09 	imes 10$$^{14}$$ Hz

Question 3

Which equation correctly relates the energy of a photon to its frequency?

Accepted Answer

$$E = h
u$$

Question 4

A radio station broadcasts at a frequency of 99.5 kHz. What is the wavelength of this radiation? ($$c = 3.00 	imes 10^8$ m/s)

Accepted Answer

$$3.02 	imes 10^3$ m

Question 5

Which phenomenon provides evidence for the wave-like nature of electrons?

Accepted Answer

The interference pattern observed in the double-slit experiment with electrons

Question 6

What is the energy of a photon with a wavelength of 12.3 nm? ($$h = 6.626 	imes 10$$^{-34}$$ J·s, c = 3.00$$ 	imes $$10^8 m/s)$$

Accepted Answer

$$1.62 	imes 10$$^{-17}$$ J

Question 7

Which of the following is NOT a valid set of four quantum numbers?

Accepted Answer

$$n=1,\ l=1,\ m_l=0,\ m_s=+1/2$$

Question 8

Which quantum number determines the shape of an atomic orbital?

Accepted Answer

Angular momentum quantum number ($$l)$$

Question 9

How many orbitals are present in the 5p subshell?

Accepted Answer

3

Question 10

Which of the following best describes the uncertainty principle?

Accepted Answer

The more precisely the position of a particle is known, the less precisely its momentum can be known.

Question 11

What is the de Broglie wavelength of an electron (mass $$9.11 	imes 10$$^{-31}$$ kg) traveling at 2.65$$ 	imes $$10^6 m/s$$? ($$h = 6.626 	imes 10$$^{-34}$$ J·s)

Accepted Answer

$$2.73 	imes 10$$^{-10}$$ m

Question 12

Which statement about atomic orbitals is correct?

Accepted Answer

The probability of finding an electron at a node is zero.

Question 13

Which of the following transitions in a hydrogen atom will emit the highest energy photon?

Accepted Answer

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

Question 14

A laser pulse contains $$5.0 	imes 10$$^{17}$$ photons, each with a frequency of 4.69$$ 	imes $$10^{14} s$^{-1}. $$What is the total energy of the pulse? ($$h = 6.626 	imes 10$$^{-34}$$ J·s)

Accepted Answer

0.16 J

Question 15

Which quantum number(s) determine the orientation of an orbital in space?

Accepted Answer

Magnetic quantum number ($$m_l)$$

Question 16

Which of the following best explains why the emission spectrum of each element is unique?

Accepted Answer

Each element has a unique set of allowed electron energy levels.

Question 17

Which of the following is a correct set of quantum numbers for a 3d orbital?

Accepted Answer

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

Question 18

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

Accepted Answer

Dumbbell-shaped with two lobes

Question 19

Which equation expresses the relationship between the uncertainty in position and momentum for a particle?

Accepted Answer

$$\Delta x \cdot \Delta (mv) \geq \frac{h}{4\pi}$$

Chapter 8: The Quantum-Mechanical Model of the Atom – Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard