Q: What is the relationship between wavelength ($$\lambda) $$and frequency ($$\nu) $$for electromagnetic radiation?

$$\lambda$$ and $$\nu$$ are inversely proportional: $$c = \lambda \nu$$

Question 1

Which region of the electromagnetic spectrum has the highest energy per photon?

Accepted Answer

Gamma ray

Question 2

What is the relationship between wavelength ($$\lambda) $$and frequency ($$
u) $$for electromagnetic radiation?

Accepted Answer

$$\lambda$$ and $$
u$$ are inversely proportional: $$c = \lambda 
u$$

Question 3

A light wave has a frequency of $$7.5 	imes 10$$^{14}$$ \ \mathrm{s}^{-1}. $$What is its wavelength in nanometers? (Speed of light $$c = 3.00 	imes 10^8$ \ \mathrm{m/s})$$

Accepted Answer

$$400 nm$$

Question 4

Which of the following best describes the dual nature of light?

Accepted Answer

Light exhibits both wave-like and particle-like properties

Question 5

According to the photoelectric effect, what happens when light of sufficient energy strikes a metal surface?

Accepted Answer

Electrons are ejected from the metal surface

Question 6

Calculate the energy of a photon with a wavelength of $$450 nm. ($$Planck's constant $$h = 6.63 	imes 10$$^{-34}$$ \ \mathrm{J \cdot s}$$, $$c = 3.00 	imes 10^8$ \ \mathrm{m/s})$$

Accepted Answer

$$4.42 	imes 10$$^{-19}$$ J

Question 7

Which quantum number primarily determines the size and energy of an atomic orbital?

Accepted Answer

Principal quantum number ($$n)$$

Question 8

For an electron in the $$n = 4$$ shell, what are the possible values for the angular momentum quantum number ($$l$$)?

Accepted Answer

$$0, 1, 2, 3$$

Question 9

Which statement about the Heisenberg Uncertainty Principle is correct?

Accepted Answer

The more precisely we know the position of a particle, the less precisely we can know its momentum

Question 10

What is the wavelength of an electron (mass $$9.11 	imes 10$$^{-31}$$ kg) moving at 4.7$$ 	imes $$10^7 m/s$$? (Use $$h = 6.63 	imes 10$$^{-34}$$ J·s)

Accepted Answer

$$1.55 	imes 10$$^{-10}$$ m

Question 11

Which set of quantum numbers is NOT allowed for an electron in an atom?

Accepted Answer

$$n = 2, \ l = 2, \ m_l = 0, \ m_s = +\frac{1}{2}$$

Question 12

How many possible values of $$m_l$$ are there for a $$d$$ orbital?

Accepted Answer

5

Question 13

Which orbital type is described as 'peanut shaped'?

Accepted Answer

p orbital

Question 14

A sodium atom's 3s electron is described by which set of quantum numbers?

Accepted Answer

$$n = 3, \ l = 0, \ m_l = 0, \ m_s = +\frac{1}{2}$$

Question 15

Which of the following best explains why atomic emission spectra are discrete lines rather than continuous?

Accepted Answer

Electrons can only occupy specific energy levels

Question 16

Which quantum number distinguishes orbitals of the same energy and shape but different orientations in space?

Accepted Answer

Magnetic quantum number ($$m_l)$$

Question 17

If $$n = 3$$ and $$l = 2$$, how many different orbitals are possible?

Accepted Answer

5

Question 18

Which of the following is a correct statement about the Schrödinger wave function?

Accepted Answer

It provides probabilities of finding an electron in a region of space

Question 19

Which of the following electromagnetic waves has the longest wavelength?

Accepted Answer

Radio

Question 20

A golf ball (mass $$65 g) is $$moving at $$240 m/s. $$What is its de Broglie wavelength? ($$h = 6.63 	imes 10$$^{-34}$$ J·s)

Accepted Answer

$$4.25 	imes 10$$^{-34}$$ m

Quantum-Mechanical Model of the Atom: Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard