An excited molecule is unstable and tends to return to its original unexcited state. Explain then,...
An excited molecule is unstable and tends to return to its original unexcited state. Explain then, how an excited electron in a chlorophyll molecule is able to store the energy of a photon.
Homework Answers
An excited molecule is unstable and tends to return to its original, unexcited state in one of three ways:
1).By converting the extra energy into heat (molecular motions) or to some combination of heat and light of a longer wavelength (fluorescence), which is what happens when light energy is absorbed by an isolated chlorophyll molecule in solution.
2).By transferring the energy—but not the electron—directly to a neighboring chlorophyll molecule by a process called resonance energy transfer.
3).By transferring the high-energy electron to another nearby molecule, an electron acceptor, and then returning to its original state by taking up a low-energy electron from some other molecule, an electron donor.
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An excited molecule is unstable and tends to return to its
original unexcited state. Explain then,...
Answer the following questions? 1. Discuss the exchange of ADP and ATP and what drives the...
Answer the following questions? 1. Discuss the exchange of ADP and ATP and what drives the exchange of ADP and ATP. 2. Describe the electron transport chain and why the electrons are passed only one direction from one transport protein to another. 3. An excited molecule is unstable and tends to return to its original unexcited state. Explain then, how an excited electron in a chlorophyll molecule is able to store the energy of a photon.
a) Explain what is meant by the Franck-Condon principle (2 marks) b) A molecule is excited...
a) Explain what is meant by the Franck-Condon principle (2 marks) b) A molecule is excited from the ground state to a higher electronic state. Describe the vibrational structure you would expect to observe and how it arises (4 marks) c) Explain using molecular orbital theory why N2 is expected to be a stable molecule whereas Be2 is expected to be an unstable molecule (4 marks)
a) Explain what is meant by the Franck-Condon principle (2 marks) b) A molecule...
1) photon dropped Eph1 with frequency vph1 on unexcited hydrogen atom on ground state then the...
1) photon dropped Eph1 with frequency vph1 on unexcited hydrogen atom on ground state then the atom ionized anf an electron comes out with kinetic energy Te , if this electron Unite with another ionic hydrogen then a third hydrogen atom in first excited level on comes out because of this unite with -3.4eV , and a new photon comes out with 466 λ. calculate the energy of first photon Eph1 and its frequency vph1 . 2) calculate the velocity...
A hydrogen atom (Z = 1) is in its 3rd excited state. It makes a transition...
A hydrogen atom (Z = 1) is in its 3rd excited state. It makes a transition to a different state, and either a photon is absorbed or emitted. a)Which transition(s) are emitting? b)Which transition(s) are absorbing? c) What is the energy of the photon emitted when the electron jumps from n = 4 to n = 3?
Match each definition with the appropriate name. Choices: absorption, emission, excited state, ionization, ground state, transition....
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An electron in an excited state of a hydrogen atom emits two photons in succession, the...
An electron in an excited state of a hydrogen atom emits two photons in succession, the first at 2624 nm and the second at 97.20 nm, to return to the ground state (n=1). For a given transition, the wavelength of the emitted photon corresponds to the difference in energy between the two energy levels. What were the principal quantum numbers of the initial and intermediate excited states involved?
electron excited from lower orbit to higher orbit and returns back to ground state from excited...
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1) If the electron starts out in the ground state and is excited to level E3...
1) If the electron starts out in the ground state and is excited
to level E3 by an incoming photon, what was the wavelength of that
photon (in nm)?
a) 95.4 nm
b) 102.5nm
c) 121.5nm
d) 136.7 nm
e) 182.3 nm
2) When the electron transitioned from E1 to E3 its orbital
radius increased by a factor of:
A) 1 (It didn’t change)
B) 2
C) 3
D) 4
E) 9
3) What is the longest wavelength the hydrogen...
For the hydrogen atom, its energy at ground state is 13.6 eV, at first excited state...
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An electron in the hydrogen atom make a transition from the ground state to an excited...
An electron in the hydrogen atom make a transition from the ground state to an excited level by absorbing energy from a photon. The wavelength of the photon is 95.0 nm. What is the final level that the electron can reach?
a) Explain what is meant by the Franck-Condon principle (2 marks) b) A molecule is excited from the ground state to a higher electronic state. Describe the vibrational structure you would expect to observe and how it arises (4 marks) c) Explain using molecular orbital theory why N2 is expected to be a stable molecule whereas Be2 is expected to be an unstable molecule (4 marks)
a) Explain what is meant by the Franck-Condon principle (2 marks) b) A molecule...
1) If the electron starts out in the ground state and is excited
to level E3 by an incoming photon, what was the wavelength of that
photon (in nm)?
a) 95.4 nm
b) 102.5nm
c) 121.5nm
d) 136.7 nm
e) 182.3 nm
2) When the electron transitioned from E1 to E3 its orbital
radius increased by a factor of:
A) 1 (It didn’t change)
B) 2
C) 3
D) 4
E) 9
3) What is the longest wavelength the hydrogen...
For the hydrogen atom, its energy at ground state is 13.6 eV, at first excited state is 3.4 eV at second excited state is 1.5 eV and at the third excited state is 0.85 eV. i) Give the energy value for the first two states in Joule (J). [1eV =1.6 x 10-19 J] (2 marks) ii) With the aid of schematic diagram, determine the energy of emitted photon when the atom jumps from the first and third excited states to...
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