13th Edition

ISBN: 9781264348992

Author: Chang

Publisher: MCGRAW-HILL HIGHER EDUCATION

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Chapter 7, Problem 7.21QP

The work function of potassium is 3.68 × 10⁻¹⁹ J. (a) What is the minimum frequency of light needed to eject electrons from the metal? (b) Calculate the kinetic energy of the ejected electrons when light of frequency equal to 8.62 × 10¹⁴ s⁻¹ is used for irradiation.

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Chapter 7, Problem 7.20QP

Chapter 7, Problem 7.22QP

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Chapter 7 Solutions

CHEMISTRY (LOOSELEAF) >CUSTOM<

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Ch. 7.3 - What is the energy of an electron in the n = 4...Ch. 7.3 - What is the wavelength (in nm) of a photon emitted...Ch. 7.4 - Calculate the wavelength (in nanometers) of a H...Ch. 7.4 - Which quantity in Equation (7.8) is responsible...Ch. 7.4 - What is the wavelength (in nm) of a neutron...Ch. 7.5 - Estimate the uncertainty in the speed of an oxygen...Ch. 7.5 - What is the difference between and 2 for the...Ch. 7.5 - A proton is moving at a speed of 6.0 106 m/s. If...Ch. 7.6 - What are the allowed values for m when n = 5 and ...Ch. 7.6 - What are the allowed values of when n = 3?Ch. 7.6 - Give the four quantum numbers for each of the two...Ch. 7.7 - Give the values of the quantum numbers associated...Ch. 7.7 - What is the total number of orbitals associated...Ch. 7.7 - Why is it not possible to have a 2d orbital, but a...Ch. 7.7 - What are the n, , and m values for orbitals in the...Ch. 7.7 - How many orbitals are there in the 5f subshell?Ch. 7.8 - Write the four quantum numbers for an electron in...Ch. 7.8 - Prob. 11PE Ch. 7.8 - Write a complete set of quantum numbers for each...Ch. 7.8 - The ground-state electron configuration of an atom...Ch. 7.8 - Determine the maximum number of electrons that can...Ch. 7.8 - Identify the error in each of the following sets...Ch. 7.9 - Prob. 13PE Ch. 7.9 - What element is represented by the following...Ch. 7.9 - Identify the element that has the following...Ch. 7.9 - Write the electron configuration for an atom of...Ch. 7 - What is a wave? Explain the following terms...Ch. 7 - What are the units for wavelength and frequency of...Ch. 7 - List the types of electromagnetic radiation,...Ch. 7 - Give the high and low wavelength values that...Ch. 7 - Briefly explain Plancks quantum theory and explain...Ch. 7 - Prob. 7.6QP Ch. 7 - (a) What is the wavelength (in nm) of light having...Ch. 7 - (a) What is the frequency of light having a...Ch. 7 - Prob. 7.9QP Ch. 7 - How many minutes would it take a radio wave to...Ch. 7 - The SI unit of time is the second, which is...Ch. 7 - Prob. 7.12QP Ch. 7 - What are photons? What role did Einsteins...Ch. 7 - Consider the plots shown here for the...Ch. 7 - A photon has a wavelength of 624 nm. Calculate the...Ch. 7 - The blue color of the sky results from the...Ch. 7 - A photon has a frequency of 6.0 104 Hz. (a)...Ch. 7 - What is the wavelength, in nm, of radiation that...Ch. 7 - When copper is bombarded with high-energy...Ch. 7 - A particular form of electromagnetic radiation has...Ch. 7 - The work function of potassium is 3.68 1019 J....Ch. 7 - When light of frequency equal to 2.11 1015 s1...Ch. 7 - (a) What is an energy level? Explain the...Ch. 7 - Prob. 7.24QP Ch. 7 - Explain why elements produce their own...Ch. 7 - Prob. 7.26QP Ch. 7 - Prob. 7.27QP Ch. 7 - Explain how astronomers are able to tell which...Ch. 7 - Consider the following energy levels of a...Ch. 7 - Prob. 7.30QP Ch. 7 - Calculate the wavelength (in nm) of a photon...Ch. 7 - Calculate the frequency (Hz) and wavelength (nm)...Ch. 7 - Prob. 7.33QP Ch. 7 - An electron in the hydrogen atom makes a...Ch. 7 - Explain the statement, Matter and radiation have a...Ch. 7 - How does de Broglies hypothesis account for the...Ch. 7 - Why is Equation (7.8) meaningful only for...Ch. 7 - (a) If a H atom and a He atom are traveling at the...Ch. 7 - Prob. 7.39QP Ch. 7 - Protons can be accelerated to speeds near that of...Ch. 7 - What is the de Broglie wavelength, in centimeters,...Ch. 7 - What is the de Broglie wavelength (in nm)...Ch. 7 - What are the inadequacies of Bohrs theory?Ch. 7 - What is the Heisenberg uncertainty principle? What...Ch. 7 - Prob. 7.45QP Ch. 7 - How is the concept of electron density used to...Ch. 7 - Prob. 7.47QP Ch. 7 - Which quantum number defines a shell? Which...Ch. 7 - Which of the following orbitals do not exist: 1p,...Ch. 7 - Which of the four quantum numbers (n, , m, ms)...Ch. 7 - Prob. 7.51QP Ch. 7 - An electron in an atom is in the n = 3 quantum...Ch. 7 - Give the values of the quantum numbers associated...Ch. 7 - Give the values of the four quantum numbers of an...Ch. 7 - Prob. 7.55QP Ch. 7 - List all the possible subshells and orbitals...Ch. 7 - What is an atomic orbital? How does an atomic...Ch. 7 - Describe the shapes of s, p, and d orbitals. How...Ch. 7 - List the hydrogen orbitals in increasing order of...Ch. 7 - Why is a boundary surface diagram useful in...Ch. 7 - Prob. 7.61QP Ch. 7 - What is the difference between a 2px and a 2py...Ch. 7 - Calculate the total number of electrons that can...Ch. 7 - Prob. 7.64QP Ch. 7 - Prob. 7.65QP Ch. 7 - Indicate the total number of (a) p electrons in N...Ch. 7 - Make a chart of all allowable orbitals in the...Ch. 7 - Why do the 3s, 3p, and 3d orbitals have the same...Ch. 7 - For each of the following pairs of hydrogen...Ch. 7 - Which orbital in each of the following pairs is...Ch. 7 - What is electron configuration? Describe the roles...Ch. 7 - Prob. 7.72QP Ch. 7 - Prob. 7.73QP Ch. 7 - What is meant by the term shielding of electrons...Ch. 7 - Indicate which of the following sets of quantum...Ch. 7 - The ground-state electron configurations listed...Ch. 7 - The atomic number of an element is 73. Is this...Ch. 7 - Indicate the number of unpaired electrons present...Ch. 7 - State the Aufbau principle and explain the role it...Ch. 7 - Prob. 7.80QP Ch. 7 - What is the noble gas core? How does it simplify...Ch. 7 - What are the group and period of the element...Ch. 7 - Prob. 7.83QP Ch. 7 - Explain why the ground-state electron...Ch. 7 - Prob. 7.85QP Ch. 7 - Comment on the correctness of the following...Ch. 7 - Prob. 7.87QP Ch. 7 - Use the Aufbau principle to obtain the...Ch. 7 - Prob. 7.89QP Ch. 7 - Prob. 7.90QP Ch. 7 - The electron configuration of a neutral atom is...Ch. 7 - Which of the following species has the most...Ch. 7 - A sample tube consisted of atomic hydrogens in...Ch. 7 - A laser produces a beam of light with a wavelength...Ch. 7 - When a compound containing cesium ion is heated in...Ch. 7 - Prob. 7.96QP Ch. 7 - Prob. 7.97QP Ch. 7 - Prob. 7.98QP Ch. 7 - Identify the following individuals and their...Ch. 7 - What properties of electrons are used in the...Ch. 7 - A certain pitchers fastballs have been clocked at...Ch. 7 - A student carried out a photoelectric experiment...Ch. 7 - (a) What is the lowest possible value of the...Ch. 7 - Considering only the ground-state electron...Ch. 7 - A ruby laser produces radiation of wavelength 633...Ch. 7 - A 368-g sample of water absorbs infrared radiation...Ch. 7 - Photodissociation of water H2O(l)+hvH2(g)+12O2(g)...Ch. 7 - Prob. 7.109QP Ch. 7 - An atom moving at its root-mean-square speed at...Ch. 7 - Prob. 7.111QP Ch. 7 - The He+ ion contains only one electron and is...Ch. 7 - Ozone (O3) in the stratosphere absorbs the harmful...Ch. 7 - The retina of a human eye can detect light when...Ch. 7 - A helium atom and a xenon atom have the same...Ch. 7 - Prob. 7.116QP Ch. 7 - Prob. 7.117QP Ch. 7 - A photoelectric experiment was performed by...Ch. 7 - Draw the shapes (boundary surfaces) of the...Ch. 7 - The electron configurations described in this...Ch. 7 - Draw orbital diagrams for atoms with the following...Ch. 7 - Prob. 7.122QP Ch. 7 - Scientists have found interstellar hydrogen atoms...Ch. 7 - Prob. 7.124QP Ch. 7 - Ionization energy is the minimum energy required...Ch. 7 - An electron in a hydrogen atom is excited from the...Ch. 7 - Prob. 7.127QP Ch. 7 - Prob. 7.128QP Ch. 7 - Prob. 7.129QP Ch. 7 - Shown are portions of orbital diagrams...Ch. 7 - The UV light that is responsible for tanning the...Ch. 7 - The sun is surrounded by a white circle of gaseous...Ch. 7 - Prob. 7.133QP Ch. 7 - Prob. 7.134QP Ch. 7 - Prob. 7.135QP Ch. 7 - In an electron microscope, electrons are...Ch. 7 - Prob. 7.137QP Ch. 7 - The radioactive Co-60 isotope is used in nuclear...Ch. 7 - (a) An electron in the ground state of the...Ch. 7 - One wavelength in the hydrogen emission spectrum...Ch. 7 - Owls have good night vision because their eyes can...Ch. 7 - For hydrogenlike ions, that is, ions containing...Ch. 7 - When two atoms collide, some of their kinetic...Ch. 7 - Calculate the energies needed to remove an...Ch. 7 - The de Broglie wavelength of an accelerating...Ch. 7 - The minimum uncertainty in the position of a...Ch. 7 - According to Einsteins special theory of...Ch. 7 - The mathematical equation for studying the...Ch. 7 - In the beginning of the twentieth century, some...Ch. 7 - Blackbody radiation is the term used to describe...Ch. 7 - Prob. 7.151QP Ch. 7 - The wave function for the 2s orbital in the...Ch. 7 - A student placed a large unwrapped chocolate bar...Ch. 7 - The wave properties of matter can generally be...Ch. 7 - Atoms of an element have only two accessible...Ch. 7 - Prob. 7.156QP Ch. 7 - Only a fraction of the electrical energy supplied...Ch. 7 - Prob. 7.158QP Ch. 7 - A typical red laser pointer has a power of 5 mW....Ch. 7 - Referring to the Chemistry in Action essay Quantum...

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The work function of potassium is 3.68 × 10 −19 J. (a) What is the minimum frequency of light needed to eject electrons from the metal? (b) Calculate the kinetic energy of the ejected electrons when light of frequency equal to 8.62 × 10 14 s −1 is used for irradiation.

Solution Summary: The author explains how the minimum light frequency required to eject electrons is calculated using the work function of potassium.

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Chapter 7 Solutions

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