Troy University Wavelength and Electromagnetic Radiation Questions

What is the wavelength (in meters) of a light with a frequency of 1.45 X 1014 Hertz?

2. Electromagnetic radiation has a wavelength of 375 nm. What is the energy of one photon of this radiation?

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3. A laser pulse with wavelength of 635 nm contains 4.63 mJ of energy. How many photons are in the laser pulse?

4. A proton has a velocity of 6.85 x 106 m/sec. What is the wavelength of the proton?

5. When electrons are removed from a sodium atom, they are removed from which energy level and sublevel first?

6. Do the electron distribution for the element zinc.

7. Do the electron distribution for the element calcium.

8. How many unpaired electrons does the element iron have?

9. How many valence electrons does the element phosphorus have?

10. What is the negative charge on the sulfur ion?

11. What is the charge on an ion of silver?

12. What is the highest numbered energy level containing electrons in the element lead?

13. Arrange the following elements from smallest to largest diameter. P, Cl, Al, Na, Ar, S.

14. Which ion has the largest diameter? Ba+2, Ca+2, Sr,+2, Be+2, Mg+2

15. Which of the following has the lowest first ionization energy? Li, Mg, P, Ca, O, K

16. Which of the following has the largest radius? Ca, K, Na, Al, Cl, Ar

17. The ion with the smallest diameter is __________. O-2 S-2 Po-2 Se-2 Te-2

18. Which elements in row 3 of the Periodic Table do not follow the expected general trend in ionization energies?

19. What element in row 4 of the Periodic Table has 6 valence electrons?

20. What factor is the cause for anomalies in first ionization energies and electron affinities of the elements in the same horizontal row (period)?

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