Question 1

All orbitals with the same value of the principal quantum number and the secondary quantum number are said to belong to the same

Accepted Answer

A) shell. 
B) subshell. 
C) group. 
D) period. 
E) class. 
A) shell. 
B) subshell. 
C) group. 
D) period. 
E) class.

Question 2

What is the energy of one mole of photons of visible light having a wavelength of 4.89 × 102 nm?

Accepted Answer

A) 1.48 × 1042 J 
B) 1.95 × 10-16 J 
C) 2.45 × 105 J 
D) 3.24 × 10-40 J 
E) 4.06 × 10-19 J 
A) 1.48 × 1042 J 
B) 1.95 × 10-16 J 
C) 2.45 × 105 J 
D) 3.24 × 10-40 J 
E) 4.06 × 10-19 J

Question 3

Which radiation has the shortest wavelength?

Accepted Answer

A) FM radio waves 
B) infrared radiation 
C) microwave radiation 
D) ultraviolet rays 
E) visible light rays 
A) FM radio waves 
B) infrared radiation 
C) microwave radiation 
D) ultraviolet rays 
E) visible light rays

Question 4

Calculate the wavelength of the spectral line in the spectrum of hydrogen for which n1 = 1 and n2 = 3.Hint: Use the Rydberg equation to solve.

Accepted Answer

A) 277 nm 
B) 103 nm 
C) 345 nm 
D) 397 nm 
E) 489 nm 
A) 277 nm 
B) 103 nm 
C) 345 nm 
D) 397 nm 
E) 489 nm

Question 5

The lowest energy state of the hydrogen atom is the most stable one, and occurs when its electron has n = 1, which brings the electron closest to the nucleus.

Accepted Answer

A) True 
 B)False

Question 6

What is the energy of one mole of photons whose wavelength is 5.461 × 102 nm?Hint: Pay careful attention to your units. 1 m = 109 nm.

Accepted Answer

A) 2.191 × 10-4 J 
B) 2.437 × 10-12 J 
C) 2.191 × 105 J 
D) 1.376 × 106 J 
E) 4.06 × 10-19 J 
A) 2.191 × 10-4 J 
B) 2.437 × 10-12 J 
C) 2.191 × 105 J 
D) 1.376 × 106 J 
E) 4.06 × 10-19 J

Question 7

A lamp that generates 25 W of energy (1 W = 1 J·s-1)emits 5.5 × 1019 photons of lightin 1 s. Calculate the wavelength (in nm)of the emitted light.Hint: Use your energy in watts and convert to J/s.

Accepted Answer

Question 8

Calculate the number of moles of photons required to heat 245 mL of water from 22.5°C to its boiling temperature in a microwave oven, which operates at a frequency of 12.50 cm. Assume the density of water is 1.0 g/mL and the specific heat capacity of water is 4.184 J/g ? °C.Hint: Water boils at 100 °C. Watch your units when solving this problem.

Accepted Answer

A) 4.55 × 1021 mol photons 
B) 3.04 × 1018 mol photons 
C) 7.79 × 10-5 mol photons 
D) 8.30 × 104 mol photons 
E) 5.53 × 102 mol photons 
A) 4.55 × 1021 mol photons 
B) 3.04 × 1018 mol photons 
C) 7.79 × 10-5 mol photons 
D) 8.30 × 104 mol photons 
E) 5.53 × 102 mol photons

Question 9

Based on its expected electron configuration, element Z = 120

Accepted Answer

A) should be an inert gas element. 
B) should have two unpaired electrons. 
C) should be an alkali metal. 
D) should be an alkaline earth element. 
E) should have four unpaired electrons. 
A) should be an inert gas element. 
B) should have two unpaired electrons. 
C) should be an alkali metal. 
D) should be an alkaline earth element. 
E) should have four unpaired electrons.

Question 10

A correct description for the electron configuration of a selenium atom is

Accepted Answer

A) [Ar] 4s1 3d10 4p5, paramagnetic. 
B) [Ar] 4s2 3d10 4p4, paramagnetic. 
C) [Ar] 4s2 3d8 4p6, paramagnetic. 
D) [Ar] 3d10 4p6, diamagnetic. 
E) [Ar] 4s1 3d9 4p6, paramagnetic. 
A) [Ar] 4s1 3d10 4p5, paramagnetic. 
B) [Ar] 4s2 3d10 4p4, paramagnetic. 
C) [Ar] 4s2 3d8 4p6, paramagnetic. 
D) [Ar] 3d10 4p6, diamagnetic. 
E) [Ar] 4s1 3d9 4p6, paramagnetic.

Question 11

The lowest energy state of an atom is the most stable one and is called the ________.

Accepted Answer

The answer of The lowest energy state of an atom...

Question 12

Calculate the wavelength, in meters, of an electron (mass = 9.109 × 10-28

Accepted Answer

Question 13

The element ________ has the ground state configuration of 1s2 2s2 2p6 3s1.

Accepted Answer

Question 14

Which atom in the set [Sr, Fr, Hg, Ga, Cr, Sn] has the smallest first ionization energy?

Accepted Answer

The answer of Which atom in the set [Sr, Fr,...

Question 15

One way in which very small particles display wavelike behavior is their ability to be diffracted when they are in beams.

Accepted Answer

A) True 
 B)False

Question 16

Which radiation has the longest wavelength?

Accepted Answer

A) gamma rays 
B) green visible light rays 
C) red visible light rays 
D) ultraviolet rays 
E) X-rays 
A) gamma rays 
B) green visible light rays 
C) red visible light rays 
D) ultraviolet rays 
E) X-rays

Question 17

Which atom has the most exothermic electron affinity?

Accepted Answer

A) O 
B) He 
C) Ga 
D) Cr 
E) F 
A) O 
B) He 
C) Ga 
D) Cr 
E) F

Question 18

The photoelectric effect

Accepted Answer

A) describes the interaction of light with a photograph. 
B) describes how electrons interact with each other. 
C) is the process in which electrons are ejected from certain material by photons. 
D) is the process of light being emitted from an electrical wire. 
E) describes the interactions of photons with a pane of glass. 
A) describes the interaction of light with a photograph. 
B) describes how electrons interact with each other. 
C) is the process in which electrons are ejected from certain material by photons. 
D) is the process of light being emitted from an electrical wire. 
E) describes the interactions of photons with a pane of glass.

Question 19

Which of the following gives a possible quantum number assignment for the last electron added to the oxygen atom when developing the electron configuration using the aufbau principle?

Accepted Answer

The answer of Which of the following gives a possible...

Question 20

According to the photoelectric effect, increasing the intensity of light will always increase the number of electrons that escape the surface of a material.

Accepted Answer

A) True 
 B)False

Exam 8: The Quantum Mechanical Atom

All orbitals with the same value of the principal quantum number and the secondary quantum number are said to belong to the same

What is the energy of one mole of photons of visible light having a wavelength of 4.89 × 102 nm?

Which radiation has the shortest wavelength?

Calculate the wavelength of the spectral line in the spectrum of hydrogen for which n1 = 1 and n2 = 3.Hint: Use the Rydberg equation to solve.

The lowest energy state of the hydrogen atom is the most stable one, and occurs when its electron has n = 1, which brings the electron closest to the nucleus.

What is the energy of one mole of photons whose wavelength is 5.461 × 102 nm?Hint: Pay careful attention to your units. 1 m = 109 nm.

A lamp that generates 25 W of energy (1 W = 1 J·s-1)emits 5.5 × 1019 photons of lightin 1 s. Calculate the wavelength (in nm)of the emitted light.Hint: Use your energy in watts and convert to J/s.

Based on its expected electron configuration, element Z = 120

A correct description for the electron configuration of a selenium atom is

The lowest energy state of an atom is the most stable one and is called the ________.

Calculate the wavelength, in meters, of an electron (mass = 9.109 × 10-28

The element ________ has the ground state configuration of 1s2 2s2 2p6 3s1.

Which atom in the set [Sr, Fr, Hg, Ga, Cr, Sn] has the smallest first ionization energy?

One way in which very small particles display wavelike behavior is their ability to be diffracted when they are in beams.

Which radiation has the longest wavelength?

Which atom has the most exothermic electron affinity?

The photoelectric effect

Which of the following gives a possible quantum number assignment for the last electron added to the oxygen atom when developing the electron configuration using the aufbau principle?

According to the photoelectric effect, increasing the intensity of light will always increase the number of electrons that escape the surface of a material.

A Very Brief History of Chemistry

Scientific Measurements

Elements, Compounds, and the Periodic Table

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Oxidation-Reduction Reactions

Energy and Chemical Change

The Basics of Chemical Bonding

Theories of Bonding and Structure

Properties of Gases

Intermolecular Attractions and the Properties of Liquids and Solids

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases, a Molecular Look

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

Filters

What is the energy of one mole of photons of visible light having a wavelength of 4.89 × 10² nm?

Calculate the wavelength of the spectral line in the spectrum of hydrogen for which n₁ = 1 and n₂ = 3.Hint: Use the Rydberg equation to solve.

What is the energy of one mole of photons whose wavelength is 5.461 × 10² nm?Hint: Pay careful attention to your units. 1 m = 10⁹^nm.

A lamp that generates 25 W of energy (1 W = 1 J·s^-1)emits 5.5 × 10¹⁹ photons of lightin 1 s. Calculate the wavelength (in nm)of the emitted light.Hint: Use your energy in watts and convert to J/s.

Calculate the wavelength, in meters, of an electron (mass = 9.109 × 10^-28

The element ________ has the ground state configuration of 1s² 2s² 2p⁶ 3s¹.