**Atomic Physics Quiz**1. An atom changing from an energy state of -0.54 eV to an energy state of -0.85 eV will emit a photon whose energy is: - (A) 0.31 eV - (B) 0.54 eV - (C) 0.85 eV - (D) 1.39 eV2. The lowest energy state of an atom is called its: - (A) ground state - (B) ionized state - (C) initial energy state - (D) final energy3. A hydrogen atom emits a photon with energy of 1.63 x 10^-18 J as it changes to the ground state. The radiation emitted by the atom would be classified as: - (A) infrared - (B) ultraviolet - (C) blue light - (D) red light4. How much energy is needed to raise a hydrogen atom from the n = 2 energy level to the n = 4 energy level? - (A) 10.2 eV - (B) 2.55 eV - (C) 1.90 eV - (D) 0.65 eV5. A hydrogen atom is excited to the n = 3 state. In returning to the ground state, the atom could not emit a photon with an energy of: - (A) 1.9 eV - (B) 10.2 eV - (C) 12.09 eV - (D) 11.4 eV6. If a hydrogen atom absorbs 1.9 eV of energy, it could be excited from energy level: - (A) n = 1 to n = 2 - (B) n = 1 to n = 3 - (C) n = 2 to n = 3 - (D) n = 2 to n = 47. In the Balmer series, during which of the following energy state changes of the hydrogen atom is the photon with the most energy emitted? - (A) n = 5 directly to n = 2 - (B) n =

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Answered: 5. An atom changing from an energy…

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9. T/F a. Perfect absorbers of electromagnetic radiation are also perfect emitters. b. At any instant in time, it is possible to specify simultaneously the position and the momentum of a particle to arbitrarily high precision. C. The ground state is the lowest energy level in an atom. d. Certain types of sunglasses are very effective at diminishing light reflected from surfaces because of polarization. e. A light ray bends when it goes from one medium to another because of diffraction.
QUESTION 8 An electron in hydrogen absorbs a photon and jumps from orbit n = 2 to n = 4. Using the energy level diagram shown, what was the energy of the absorbed photon? a. 0 eV b. 0.85 eV c. 3.4 eV d. 10.2 eV e. 2.55 eV
2. Consider an electron in a hydrogen atom that is transitioning from the n = 2 to the n = 6 level.What is the wavelength (in nm) of the photon associated with this transition?
11. In the Balmer series, during which of the following energy state changes of the hydrogen atom is the photon with the most energy emitted? (A) n = 5 directly to n = 2 (B) n = 4 directly to n = 2 (C) n = 2 directly to n = 4 (D) n = 2 directly to n = 5 12. What is the minimum energy needed to ionize a hydrogen atom when it is in the n = 2 state? (A) 1.9 eV (B) 3.4 eV (C) 12.2 eV (D) 13.6 eV
3. In the He+ ion, which transition results in UV emission? 4. In the He+ ion which transition produces visible light emission? 5. Which transitions can produce X-ray emission?
2. Below are the energies of the first 6 energy levels in Lithium as well as the energies of 6 photons. How many of the photons can be created by an electron that transitions between the any two of the first 6 energy levels in Lithium? En (eV) n 1 2 3 4 5 6 -122.4 -30.6 -13.6 -7.65 -4.896 -3.4 Photon Energies (eV) 108.8 2.754 12.562 27.2 47.29 17.0
Which of these expressions would yield the wavelength of light in meters emitted when an electron drops from orbit n = 3 to n = 2 in a Bohr hydrogen atom? Given h = 4.14 x 10-15 eVs and c = 3.00 x 108 m/s. a. 1.89/hxc b. hc/1.89 c. 1.89 x h x c d. (1.51 + 3.4)/hc e. hc/3.4
QUESTION 13 Removing an electron from the metal requires 3.5 eV. The conversion between eV and J is: 1 eV = 1.6 x 10-19 J a) How many Joules is that? b) What is the velocity of the electron upon emission if the electron's mass is m-9.1*10-31 kg?
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7. When an electron transitions from the third excited state to the ground state in a hydrogen atom, the energy emitted in one photon is: A. 12.7 eV B. 10.5 eV C. 3.6 eV D. 0 eV
10. If the ground state of an electron in a hydrogen-like atom has an energy of -x eV, which of the following is the energy of one of the excited states? A. -x/9 eV B. -x/2 eV C. -x/3 eV D. - -x/8 eV

5. An atom changing from an energy state of -0.54 eV to an energy state of -0.85 eV will emit a photon whose energy is (A) 0.31 eV (B) 0.54 eV (D) 1.39 eV (C) 0.85 eV The l