Atomic Theory Tutorial Questions

Atomic Theory Tutorial Questions 1. An infrared photon has wavelength 946 nm. What is the energy of this photon? 2. Which has more energy, a photon with wavelength 400 nm or a photon with frequency of 3.55 GHz? 3. An electron in a hydrogen atom relaxes from the n = 6 to the n = 3 level. Calculate the energy of the photon emitted in this process. What region of the electromagnetic spectrum does this photon fall under? 4. Calculate the mass in kg of a particle moving at 4.22 x 105 m/s with a de Broglie wavelength of 2.35 x 10-17 m. 5. Which of the following combinations of quantum numbers correspond to electrons present in the ground state of phosphorous? (Choose all that apply) a. 2, 0, 1, ½ b. 1, 0, 0, -½ c. 2, 1, -1, ½ d. 1, 1, 0, 0 e. 3, 1, -1, ½ f. 3, 0, 0, ½ 6. An electron orbital containing 1 planar node and 2 spherical nodes would correspond to which orbital? 7. Write a valid combination of quantum numbers to describe an electron in the following subshells: a. 4d b. 6s

c. 5f d. 2p 8. Write the electron configuration for ground state Cr and then write the configurations for Cr3+ and Cr6+. 9. Write the electron configurations for the following species. a. Fe b. B2c. Mg2+ d. V1+ e. Ge2+ 10.Rank the following elements from least to most electronegative: P, O, Mg, Rb, Ca 11.Which of the following species are isoelectronic with Si2+? a. P3+ b. S2c. Mg d. Na+ e. Ne212.Which of the following quantum number combinations are not valid, and why? a. 4, 2, -2, ½ b. 3, 3, 0, ½ c. 1, 0, 1, -½

d. 2, 1, 1, -½ 13.Rank the following elements in order of decreasing ionization energy: Cr, As, N, Sr, F