Question

12. Oxygen atom emits green light with a wavelength of 780 nm . Calculate the frequency of this light. 13. A FM radio station in Lusaka broadcasts at 99.5 MHz . Calculate the wavelength of the corresponding radio waves. 14. Element \( Y \) emits a blue photon with a wavelength of \( 4.8 \times 10^{-5} \mathrm{~cm} \). Calculate, a) The energy of a blue photon in joules b) The energy of a blue photon in electron volts ( eV ). 15. It takes \( 7.21 \times 10^{-19} \mathrm{~J} \) of energy to remove an electron from a sodium atom. What is the maximum wavelength of light that can do this? 16. A copper bullet has a velocity that is \( 90 \% \) of the speed of light. If the wavelength of the copper bullet is \( 1.5 \times 10^{-3} \mathrm{pm} \), calculate the mass of the copper bullet. 17. Calculate the wavelength of light emitted when the following transition occurs in the hydrogen atom, \( \mathrm{n}=5 \) to \( \mathrm{n}=3 \). 18. An excited hydrogen atom emits light with a wavelength of 397.2 nm to reach the energy level for which \( \mathrm{n}=2 \). In which principal quantum level did the electron begin? 19. An electron in a certain atom is in the \( \mathrm{n}=2 \) quantum level. List the possible values of \( l \) and \( \mathrm{m} / \) that it can have. 20. Using the Heisenberg uncertainty principle, calculate \( \Delta \mathrm{x} \) for an electron with \( \Delta v=0.100 \) \( \mathrm{m} / \mathrm{s} \).

          12. Oxygen atom emits green light with a wavelength of 780 nm . Calculate the frequency of this light.
13. A FM radio station in Lusaka broadcasts at 99.5 MHz . Calculate the wavelength of the corresponding radio waves.
14. Element \( Y \) emits a blue photon with a wavelength of \( 4.8 \times 10^{-5} \mathrm{~cm} \). Calculate,
a) The energy of a blue photon in joules
b) The energy of a blue photon in electron volts ( eV ).
15. It takes \( 7.21 \times 10^{-19} \mathrm{~J} \) of energy to remove an electron from a sodium atom. What is the maximum wavelength of light that can do this?
16. A copper bullet has a velocity that is \( 90 \% \) of the speed of light. If the wavelength of the copper bullet is \( 1.5 \times 10^{-3} \mathrm{pm} \), calculate the mass of the copper bullet.
17. Calculate the wavelength of light emitted when the following transition occurs in the hydrogen atom, \( \mathrm{n}=5 \) to \( \mathrm{n}=3 \).
18. An excited hydrogen atom emits light with a wavelength of 397.2 nm to reach the energy level for which \( \mathrm{n}=2 \). In which principal quantum level did the electron begin?
19. An electron in a certain atom is in the \( \mathrm{n}=2 \) quantum level. List the possible values of \( l \) and \( \mathrm{m} / \) that it can have.
20. Using the Heisenberg uncertainty principle, calculate \( \Delta \mathrm{x} \) for an electron with \( \Delta v=0.100 \) \( \mathrm{m} / \mathrm{s} \).

12. Oxygen atom emits green light with a wavelength of 780 nm . Calculate the frequency of this light.
13. A FM radio station in Lusaka broadcasts at 99.5 MHz . Calculate the wavelength of the corresponding radio waves.
14. Element Y emits a blue photon with a wavelength of 4.8 × 10^-5 cm. Calculate,
a) The energy of a blue photon in joules
b) The energy of a blue photon in electron volts ( eV ).
15. It takes 7.21 × 10^-19 J of energy to remove an electron from a sodium atom. What is the maximum wavelength of light that can do this?
16. A copper bullet has a velocity that is 90 % of the speed of light. If the wavelength of the copper bullet is 1.5 × 10^-3pm, calculate the mass of the copper bullet.
17. Calculate the wavelength of light emitted when the following transition occurs in the hydrogen atom, n=5 to n=3.
18. An excited hydrogen atom emits light with a wavelength of 397.2 nm to reach the energy level for which n=2. In which principal quantum level did the electron begin?
19. An electron in a certain atom is in the n=2 quantum level. List the possible values of l and m / that it can have.
20. Using the Heisenberg uncertainty principle, calculate Δx for an electron with Δ v=0.100 m / s.

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