Ch.7 - Quantum MechanicsSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

What happens when light strikes the surface of a metal? The Photoelectric Effect can help to explain that. 

Examining the Photoelectric Effect

Concept #1: Understanding the Photoelectric Effect

The Photoelectric Effect was theorized by Albert Einstein to help explain what would happen to the electrons on the surface of a metal when a photon (light particle) with enough energy struck. 

Concept #2: Illustrating what happens when a photon strikes the surface of a metal.

Additional Problems
In an experiment of the photoelectric effect, an incident beam of ultraviolet radiation shined on a piece of metal and produced electrons with zero kinetic energy. Which of the following radiation would be most likely to produce electrons with some kinetic energy? A. radio wave B. microwave C. green light D. infrared E. gamma ray
It takes 261 kJ/mol to eject electrons from a certain metal surface. What is the longest wavelength of light (nm) that can be used to eject electrons from the surface of this metal via the photoelectric effect? A) 233 B) 165 C) 552 D) 458 E) 725
The figure below shows Ek plotted as a function of v for photoelectric emission from two metals, A and B. Which of the following statements for the two metals is correct? A. Both metals will produce the approximately equal currents under identical conditions. B. The threshold frequencies suggest that metal A is an alkali metal. C. The threshold frequency is the same for both metals. D. The threshold frequency of A is greater than that of B. E. The threshold frequency of A is less than that of B.
The ionization energy of sodium is 496 kJ/mol. In an experiment similar Hertz's experiment to which Einstein famously discovered the photoelectric effect, which statement below is true about the wavelength of radiation that could cause sodium to be ionized upon irradiation? A. If sodium is irradiated with radiation with a wavelength greater than 496 nm, sodium can become ionized B. If sodium is irradiated with radiation with a wavelength greater than 241 nm, sodium can become ionized C. If sodium is irradiated with radiation with a wavelength lower than 496 nm, sodium can become ionized D. If sodium is irradiated with radiation with a wavelength lower than 241 nm, sodium can become ionized E. Since radiation is not a particle, no form of it may cause an electron to be ejected from sodium
Consider two different light sources produce photons of light with wavelengths of 225 nm and 650 nm. If these photons are shined onto zinc metal, which has a work function of 350 kJ/mol, which statement is true? (Hint: The work function corresponds to the least amount of energy required to cause an electron to be ejected from a substance). a. Only the 225 nm photon can cause an electron to be ejected from zinc. b. Only the 650 nm photon can cause an electron to be ejected from zinc c. Neither photon can cause an electron to be ejected from zinc d. Both 225 and 650 nm photons can cause an electron to be ejected from zinc e. None of the above
The work function for chromium metal is 4.37 eV. What wavelength of radiation must be used to eject electrons with a velocity of 2500 km/s?
The photoelectric effect provided evidence for the (wave, particle)-like behavior of light. The phenomenon of diffraction provided evidence for the (wave, particle)-like bahavior of light.  1. wave, wave 2. wave, particle 3. particle, wave 4. particle, particle
Magnesium metal is used in a photoelectric effect experiment.  The work function for Mg (i.e. the energy required to remove an electron) is 3.68 eV.  What is the longest wavelength of light, in nm, that can remove an electron from the Mg.   (1 eV = 1.602 x 10 -19 J; h = 6.63 x 10 -34 J•sec; c = 3.00x10 8 m/sec).  
Determine the longest wavelength of light required to remove an electron from an atom of a metal, if the binding energy for an electron in that metal is 309 kJ/mol.a. 147 nmb. 68.0 nmc. 113 nmd. 885 nme. 387nm
Determine the shortest frequency of light required to remove an electron from a sample of a metal, if the binding (threshold) energy of the metal is 3.14x103 kJ/mol. a. 7.87x1015 Hzb. 4.74x1015 Hzc. 2.11x1015 Hzd. 1.27x1015 Hze. 6.19x1015 Hz 
R = 2.18x10-18 J;  h = 6.626x10-34 J•sec or 6.626x10-34 kg•m2 sec-1;  c = 3.00 x 10 8 m•sec-1; 1eV= 1.602x10-19 J a.) What is the energy of a photon with a wavelength of 335 nm?    b.) If a metal that has a work function of 2.80 eV, what wavelength of light is required to generate electrons with a kinetic energy of 1.02 eV?      c.) If a reaction is exothermic, does it mean that ΔE for the reaction is negative? Explain.   
The first ionization energy of carbon is 1.81 aJ. Assuming an ionization efficiency of 22.35%, how many photons of the lowest possible frequency are required to ionize a sample of carbon that contains 5.32 x 1018 atoms?a) 2.38 x 1019 photonsb) 4.20 x 10-20 photonsc) 2.73 x 1015 photonsd) 9.11 x 106 photons 
Determine the longest wavelength of light required to remove an electron from a sample of potassium metal, if the binding energy for an electron in K is 1.76 × 103 kJ/mol.A) 113 nmB) 885 nmC) 68.0 nmD) 147 nmE) 387 nm 
What is a quantum of light called?a) the wavelengthb) the frequencyc) the amplituded) a photon
Assuming an ionization efficiency of 18.0%, how many photons are needed to ionize 1.00 x 1016 atoms?
Molybdenum metal must absorb radiation with a minimum frequency of 1.09 x 10 15 s-1 before it can eject an electron from its surface via the photoelectric effect. (a) What is the minimum energy needed to eject an electron?
Molybdenum metal must absorb radiation with a minimum frequency of 1.09 x 10 15 s-1 before it can eject an electron from its surface via the photoelectric effect. (b)What wavelength of radiation will provide a photon of this energy?
Molybdenum metal must absorb radiation with a minimum frequency of 1.09 x 10 15 s-1 before it can eject an electron from its surface via the photoelectric effect. (c) If molybdenum is irradiated with light of wavelength of 120 nm, what is the maximum possible kinetic energy of the emitted electrons?
Sodium metal requires a photon with a minimum energy of 4.41 x 10 -19 J to emit electrons. (c) If sodium is irradiated with light of 439 nm, what is the maximum possible kinetic energy of the emitted electrons?