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1. What is the energy in eV of the electron of a hydrogen atom

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1. What is the energy in eV of the electron of a hydrogen atom for the orbit designated n = 3? eV

2. Photons of a certain ultraviolet light have an energy of 6.83 10-19 J. (a) What is the frequency of this UV light?____Hz (b) Use λ= c/f to calculate its wavelength in nm.____nm

3. Use table to determine the energy in eV of the photon absorbed when an electron jumps down from the n = 4 orbit to the n = 1 orbit of a hydrogen atom.___eV

4. What is the radius in nm of the electron orbit of a hydrogen atom for n = 3?____nm?

5. Calculate the de Broglie wavelength of a 0.58 kg ball moving with a constant velocity of 26 m/s (about 60 mi/h). ____m?

6.What is the de Broglie wavelength for Saturn (m = 5.69 1026 kg) as it moves in its orbit with a speed of 9.60 103 m/s? m ?

7.The human eye is sensitive to orange light having a frequency of about 4.95 1014 Hz (a wavelength of about 608 nm). What is the energy in joules of the photons associated with this light? _____J

8. Pick the radionuclide in each set.

a) 227 28 89Ac 14Si

b) 237 Np 20Ne 89Ac 14 Si

c) 10B 70Ga 5 31 Explain your choice. its atomic number is XXXXX than 83? it has fewer n than p in the nucleus? it is an odd-odd nuclide? none of the above?

9. Fill in the nine gaps in this table. Symbol Be Protons 8 Neutrons 8 Electrons 10 Mass number 9 20

10. Technetium-99 (half-life = 6.0 h) is used in medical imaging. How many half-lives would go by in 40. h? ____half-lives?

11. A clinical technician finds that the activity of a sodium-24 sample is 480 cpm. What will the activity of the sample 30 h later if the half-life of sodium-24 is 15 h? ___cpm?

12 Use the graph to find how long it would take the original sample of radionuclide A to decrease to 12 g.____d ? ￼

13. A thyroid cancer patient is given a dosage of 131I (half-life = 8.1 d). What fraction of the dosage of 131I will still be in the patient's thyroid after 40.5 days?

Hello. Can u skip those with graph and submit solutions for the others please? Please advise how I would be able to upload the graphs as I tried to copy and paste here but not working.

1. What is the energy in eV of the electron of a hydrogen atom for the orbit designated n = 3? eV Energy = -13.6/n^{2} = -13.6/3^{2} = -1.511eV 2. Photons of a certain ultraviolet light have an energy of 6.83 10-19 J. (a) What is the frequency of this UV light?_

1.0307*10^{15}Hz (b) Use λ= c/f to calculate its wavelength in nm.

291nm 3. Use table to determine the energy in eV of the photon absorbed when an electron jumps down from the n = 4 orbit to the n = 1 orbit of a hydrogen atom.

10.2eV 4. What is the radius in nm of the electron orbit of a hydrogen atom for n = 3?____nm? 9a_{0} = 0.4761nm 5. Calculate the de Broglie wavelength of a 0.58 kg ball moving with a constant velocity of 26 m/s (about 60 mi/h). ____m? Wave length = h/(mv) = 4.393*10^{-15}m 6.What is the de Broglie wavelength for Saturn (m = 5.69 1026 kg) as it moves in its orbit with a speed of 9.60 103 m/s? m ? 1.213*10^{-64}m 7.The human eye is sensitive to orange light having a frequency of about 4.95 1014 Hz (a wavelength of about 608 nm). What is the energy in joules of the photons associated with this light? _____J

Energy = hf = 6.626*10^{-34}*4.95*10^{14} = 3.28*10^{-19}J 8. Pick the radionuclide in each set. The atomic number and atomic are not clearly written. a) 227 28 89Ac 14Si

b) 237 Np 20Ne 89Ac 14 Si

c) 10B 70Ga 5 31 Explain your choice. its atomic number is XXXXX than 83? it has fewer n than p in the nucleus? it is an odd-odd nuclide? none of the above?

The question is not clear. I think it should be U235.

9. Fill in the nine gaps in this table. Symbol Be Protons 8 Neutrons 8 Electrons 10 Mass number 9 20

Table is required

10. Technetium-99 (half-life = 6.0 h) is used in medical imaging. How many half-lives would go by in 40. h? ____half-lives? 6.67 half lives

11. A clinical technician finds that the activity of a sodium-24 sample is 480 cpm. What will the activity of the sample 30 h later if the half-life of sodium-24 is 15 h? ___cpm? 120cpm

12 Use the graph to find how long it would take the original sample of radionuclide A to decrease to 12 g.____d ? ￼ Graph is required. 13. A thyroid cancer patient is given a dosage of 131I (half-life = 8.1 d). What fraction of the dosage of 131I will still be in the patient's thyroid after 40.5 days?

3.125%

Kindly submit graphs and tables to reply the remaining questions.

Kindly ACCEPT the answers. BONUS and POSITIVE feedback will be appreciated.

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