# Asdfghjk Essay

2443 Words10 Pages
Midterm #3 Practice Exam 1. The energy of a photon of light is __________ proportional to its frequency and __________ proportional to its wavelength. A. directly, inversely B. indirectly, not C. directly, directly D. inversely, inversely E. inversely, directly 2. What is the frequency of light (s-1) that has a wavelength of 1.23 x 10-6 cm? A. 2.44 x 1014 B. 3.69 C. 4.10 x 10-17 D. 2.44 x 1016 E. 9.62 x 1012  3. The energy of a photon that has a wavelength of 13.2 nm is __________ J. A. 1.99 x 10-25 B. 9.55 x 10-25 C. 6.62 x 1016 D. 1.51 x 10-17 E. 1.51 x 10-26 4. Of the following transitions in the Bohr hydrogen atom, the __________ transition results in the emission of the highest-energy photon. A. n = 3 n = 6 B. n = 1n = 6 C. n = 6  n = 1 D. n = 6n = 3 E. n = 1n = 4 5. The frequency of electromagnetic radiation required to promote an electron from n=2 to n=4 in a Bohr hydrogen atom is __________ Hz. A. 6.2 x 1014 B. 4.1 x 1019 C. 5.4 x 10-19 D. 8.2 x 1014 E. 4.1 x 10-19 6. The lines in the emission spectrum of hydrogen result from __________. A. photons given off when an electron moves from a higher energy state to a lower energy state B. electrons given off by hydrogen when it burns C. protons given off when hydrogen burns D. electrons given off by hydrogen as it cools E. photons given off when a proton moves from a higher energy state to a lower energy state 7. There are __________ orbitals in the third shell. A. 16 B. 4 C. 25 D. 1 E. 9 8. The __________ subshell contains only one orbital. A. 6f B. 3d C. 4s D. 5d E. 1p 9. An electron cannot have the quantum numbers n = _____, l = _____, ml = _____. A. 3, 2, -2 B. 1, 0, 0 C. 3, 2, 3 D. 3, 2, 1 E. 6, 1, 0 11. In a hydrogen atom, an electron in a __________ orbital can absorb a photon, but cannot emit a photon. A. 1s B. 3p