Ch.7 - Quantum MechanicsWorksheetSee all chapters
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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

Solution: 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

Problem

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 3.14x10kJ/mol.

 

a. 7.87x1015 Hz

b. 4.74x1015 Hz

c. 2.11x1015 Hz

d. 1.27x1015 Hz

e. 6.19x1015 Hz 

Solution

We’re being asked to determine the shortest frequency of light required to remove an electron from a sample of metal. The threshold frequency of the metal is 3.14x103 kJ/mol.

Recall that work function or threshold frequency of the metal is the minimum energy required to remove an electron from the metal.


Therefore, we can calculate the shortest frequency of light required from the threshold frequency or threshold energy.

Given:

ΔE = 3.14x103 kJ/mol

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