True or False. (a) According to the Heisenberg Uncertainty Principle, it is impo

Question

True or False.
(a) According to the Heisenberg Uncertainty Principle, it is impossible to know simultaneously both the exact
momentum of the electron and its exact location in space.
Answer: ____________
(b) According to Born, taking the square root of would give the probability of finding the electron in a certain
region of space at a given time.
Answer: ____________
(c) Based on the results from blackbody radiation, Max Planck assumed that energy can only be emitted in
discrete amounts.
Answer: ____________
(d) Niels Bohr postulated that when an electron changes from the higher energy state to the lower energy state,
electromagnetic radiation is released.
Answer: ____________
(e) Electromagnetic radiations with different wavelengths have different effect on matter.
Answer: ____________
(f) In line spectra, photons are emitted at discrete wavelengths.
Answer: ____________
(g) The principle quantum number describes the energy of the orbital.
Answer: ____________
(h) Valence electrons are the core electrons used for forming chemical bonds.
Answer: ____________
(i) The angular momentum quantum number describes the shape of the orbital.
Answer: ____________
(j) All s orbital are spherical with the same size.
Answer: ____________

Explanation / Answer

(a) According to the Heisenberg Uncertainty Principle, it is impossible to know simultaneously both the exact
momentum of the electron and its exact location in space.
Answer: True
(b) According to Born, taking the square root of would give the probability of finding the electron in a certain
region of space at a given time.
Answer: True
(c) Based on the results from blackbody radiation, Max Planck assumed that energy can only be emitted in
discrete amounts.
Answer: True
(d) Niels Bohr postulated that when an electron changes from the higher energy state to the lower energy state,
electromagnetic radiation is released.
Answer: False
(e) Electromagnetic radiations with different wavelengths have different effect on matter.
Answer: False
(f) In line spectra, photons are emitted at discrete wavelengths.
Answer: True
(g) The principle quantum number describes the energy of the orbital.
Answer: True
(h) Valence electrons are the core electrons used for forming chemical bonds.
Answer: True
(i) The angular momentum quantum number describes the shape of the orbital.
Answer: True
(j) All s orbital are spherical with the same size.
Answer: True

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