Question 1

Which of the following statements best describes the difference between a continuous spectrum and a line spectrum?

Accepted Answer

A line spectrum consists of discrete bright lines unique to each element, while a continuous spectrum is smoothly blended and contains all wavelengths.

Question 2

A radio signal operates at a frequency of $$7.21 	imes 10^7$ Hz. What is the wavelength of this signal in meters? (Speed of light c = 3.00$$ 	imes $$10^8 m/s)$$

Accepted Answer

$$2.41 m$$

Question 3

Which color of visible light has the highest frequency, and what does this imply about its wavelength?

Accepted Answer

Violet; it has the shortest wavelength.

Question 4

According to the Bohr model, what happens when an electron in a hydrogen atom transitions from a higher energy level to a lower energy level?

Accepted Answer

The atom emits a photon with energy equal to the difference between the two levels.

Question 5

What is the energy of a single photon of light with a wavelength of $$589 nm$$? (Planck's constant $$h = 6.626 	imes 10$$^{-34}$$ J·s, speed of light c = 3.00$$ 	imes $$10^8 m/s)$$

Accepted Answer

$$3.38 	imes 10$$^{-19}$$ J

Question 6

Which quantum number determines the shape of an orbital?

Accepted Answer

Angular momentum quantum number $$l$$

Question 7

How many electrons can occupy a single $$p$$ orbital?

Accepted Answer

2

Question 8

Which of the following electron configurations represents a transition metal?

Accepted Answer

$$1s^2$$ $$2s^2$$ $$2p^6$$ $$3s^2$$ $$3p^6$$ $$4s^2$$ $$3d^5$$

Question 9

Which of the following is the correct order of increasing atomic radius for the isoelectronic series: F$$^-$$, Na$$^+$$, Mg$$^{2+}$$, and O$$^{2-}$$?

Accepted Answer

Mg$$^{2+}$$ \u003c Na$$^+$$ \u003c F$$^-$$ \u003c O$$^{2-}$$

Question 10

What is the abbreviated electron configuration for Fe?

Accepted Answer

$$[Ar] 4s^2$ 3d^6$

Question 11

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

Accepted Answer

Magnetic quantum number $$m_l$$

Question 12

According to Hund's rule, how are electrons distributed in degenerate orbitals?

Accepted Answer

Electrons fill each orbital singly with parallel spins before pairing.

Question 13

What is the wavelength range of visible light?

Accepted Answer

$$400 nm to$$ $$700 nm$$

Question 14

Which of the following best explains the Heisenberg Uncertainty Principle?

Accepted Answer

It is impossible to know both the exact position and exact momentum of a particle simultaneously.

Question 15

Which element is represented by the electron configuration $$1s^2$$ $$2s^2$$ $$2p^6$$ $$3s^2$$ $$3p^6$$ $$4s^1$$?

Accepted Answer

Potassium (K)

Question 16

What is the maximum number of electrons that can have the quantum numbers $$n = 3$$, $$l = 2$$, $$m_l = -1 in an $$atom?

Accepted Answer

2

Question 17

Which of the following species is the largest in size?

Accepted Answer

S$$^{2-}$$

Question 18

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

Accepted Answer

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

Question 19

Which rule states that no two electrons in an atom can have the same set of four quantum numbers?

Accepted Answer

Pauli Exclusion Principle

Chapter 5 Student Notes

Guida di studio - Domande di pratica

Study guide - Flashcard