In J. J. Thompson’s experiment depicted in Figures 1.10 and 1.11, assume that the electrons are initially traveling at a speed of
Trending nowThis is a popular solution!
Chapter 1 Solutions
Principles of Modern Chemistry
- In Einstein's photoelectric experiment, the kinetic energy (K.E.) of an electron displaced from a metal by a photon was the difference in energy between the photon and a threshold energy value for the metal. If you were to perform a similar experiment with the metal platinum, which has a threshold energy of 9.04 × 10⁻¹⁹ J, and ultraviolet light of wavelength 45.5 nm, what would be the speed (v) of the dislodged electron in meters per second? (K.E. = 1/2mv². The mass of the electron = 9.109 × 10⁻³¹ kg.)arrow_forwardWater is exposed to infrared radiation of wavelength 2.8×10−4 cm . Assume that all the radiation is absorbed and converted to heat. How many photons will be required to raise the temperature of 2.1 g of water by 2.3 K ? Express your answer using two significant figures.arrow_forwardAn electron in a hydrogen atom travels from energy level n = 1 to energy level n = 5. Would the electron be absorbing or emitting this energy in this transition? What is the change in energy (ΔE) for this transition? Show all work, including units and signs, and give your answer for ΔE to three significant figures.arrow_forward
- the speed of the electron were 3.6*10^ 9 m/s be the corresponding orbital ? Express your answer using two significant figures.arrow_forwardWhat are the basic SI units for (a) the wavelength of light,(b) the frequency of light, (c) the speed of light?arrow_forward2.) What is the wavelength (in nanometers) of light that has a frequency of 8.60 X 1014? Write your answer with 3 digits only - for example, 545 or 92.7. Do not include the unit nm.arrow_forward
- How can I find the density of a metal in g/cm^3 only given the name and edge length in A (assuming atoms?). I have calculated radius in A correctly.arrow_forwardFor a potassium-chlorine ion pair, our textbook (problem 2.19) tells us that the attractive energy EA (in eV) for this pair is: EA= -1.436/r where r is the distance (in nm) between the centers of the two ions. The repulsive energy ER (in eV) for this pair is: ER= 5.86 x 10-6/r9 The attractive energy comes from Coulomb’s law where the repulsive energy is provided by an empirical equation(i.e., it fits data rather than it is derived based on a model). (a.) Using only the information provided above, calculate the equilibrium separation distance between K1+ and Cl1- in nanometers(ro). (b.) Based on your answer to (a.), calculate the so-called binding (or bonding) energy in eV. This is the “depth” of the energy well.arrow_forwardDescribe the theory of the apparatus, a method of determining e/m for an electron.arrow_forward
- Consider the transition of the electron in the hydrogen atom from n = 4 to n = 9. a) Is ΔE for this process positive or negative? b) Will the light be absorbed or emitted? c) Does this transition correspond to an endothermic or exothermic reaction?arrow_forwardWhat is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency 1.90×1015Hz? Express your answer in joules to three significant figures.arrow_forwardCalculate the energy (in Joules) for light with the frequency of 3.1 X 10^4 Hz.arrow_forward
- ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage LearningChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill EducationPrinciples of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
- Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill EducationChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage LearningElementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY