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CHEM103- MODULE 2 EXAM 2025 QUESTIONS AND ANSWERS

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Observations/ theories supporting the wave nature of light - ANS - optical phenomena such as reflection/ refraction - light passing through narrow, closely spaced slits produces interference patterns - James Clerk Maxwell's theory of electromagnetic radiation Observations/ theories supporting the particle nature of light - ANS - Newton's law of motion (light was streams of extremely tiny particles traveling at high speeds according to his laws of motion) - photoelectric effect - blackbody radiation 3 main features of the Bohr model that apply to all models - ANS 1. The energies of electrons in an atom are quantized CHEM103- MODULE 2 EXAM 2025 QUESTIONS AND ANSWERS COPYRIGHT © 2025 FYNDLAY ALL RIGHTS RESERVED 2 2. An electron's energy increases with increasing distance from the nucleus. 3. The discrete energies of light emitted by elements in an excited state result from quantized electronic energies. Symbol, allowed values, and meaning of principal quantum number - ANS n 1 to infinity Specifies the shell an electron occupies in an atom Symbol, allowed values, and meaning of secondary (angular momentum) quantum number - ANS l 0 to n-1 The shape of the orbital, also known as the subshell Symbol, allowed value, and meaning of the magnetic quantum number - ANS ml -l to l The orientation of the orbital Symbol, allowed valu

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Chem 103
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CHEM103- MODULE 2 EXAM 2025
QUESTIONS AND ANSWERS




Observations/ theories supporting the wave nature of light - ANS - optical phenomena such

as reflection/ refraction


- light passing through narrow, closely spaced slits produces interference patterns


- James Clerk Maxwell's theory of electromagnetic radiation




Observations/ theories supporting the particle nature of light - ANS - Newton's law of motion

(light was streams of extremely tiny particles traveling at high speeds according to his laws of

motion)


- photoelectric effect


- blackbody radiation




3 main features of the Bohr model that apply to all models - ANS 1. The energies of electrons

in an atom are quantized

COPYRIGHT © 2025 FYNDLAY ALL RIGHTS RESERVED 1

, 2. An electron's energy increases with increasing distance from the nucleus.


3. The discrete energies of light emitted by elements in an excited state result from quantized

electronic energies.




Symbol, allowed values, and meaning of principal quantum number - ANS n


1 to infinity


Specifies the shell an electron occupies in an atom




Symbol, allowed values, and meaning of secondary (angular momentum) quantum number -

ANS l


0 to n-1


The shape of the orbital, also known as the subshell




Symbol, allowed value, and meaning of the magnetic quantum number - ANS ml


-l to l


The orientation of the orbital




Symbol, allowed value, and physical meaning of the spin quantum number - ANS ms

COPYRIGHT © 2025 FYNDLAY ALL RIGHTS RESERVED 2
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