CHEM 6A Chapter Notes - Chapter 4: Bohr Model, James Clerk Maxwell, Double-Slit Experiment

Which of the following regions of the electromagnetic spectrum have longer wavelengths than visible light? 1.infrared radiation 2. ultraviolet radiation 3. microwave radiation a. 1 only b. 2 only c. 3 only d. 1 and 2 e. 1 and 3 If a radio wave has a frequency of 17.0 MHz, what is the wavelength of this radiation?

and the having the shortest ending with radiation wavelength. Give the high and low wavelength values that define the visible region of the electromagnetic spectrum. Briefly explain Planck's quantum theory and explain 7.4 The Ph tum is. What are the units for Planck's Review constant? Give two everyday examples that illustrate the con- cept of quantization. 7.13 er Problems 7 (a) What is the wavelength (in nanometers) of light having a frequency of 8.6 × 1013 Hz? (b) What is the frequency (in Hz) of light having a wavelength of 566 nm? (a) What is the frequency of light having a wave- length of 456 nm? (b) What is the wavelength (in nanometers) of radiation having a frequency of 2.45 × 109 Hz? (This is the type of radiation used in microwave ovens.) rallel 7.8 deline fir cla- c number table 7.9 The average distance between Mars and Earth is about 1.3 × 108 miles. How long would it take TV pictures transmitted from the Viking space vehicle on Mars' surface to reach Earth? (1 mile 1.61 km.)

ZA Indicate the answer choice that best completes the statement or answers the question. 1. Erwin Schrödinger developed a model for the behavior of electrons in atoms that is known as quantum mechanics. Which of the following statements concerning this model isare CORRECT 1. The energy of an electron is quant 2. The energy of an 3. Electrons travel in circular orbits around a nucleus. tized. electron is equal to its mass multiplied by the square of its velocity a. I only b. 2 only c. 3 only d. 1 and 2 e 1,2, and 3 (mass 1673 x 10-27 kg) moving 2. For a proton (mass-i with a velocity of 2.83 x 1o1 m/s, what is the de Broglie wavelength of 2.8 (in pm)? a. 0.356 pm b. 3.56 pm c. 14.0 pm d. 7.15 pm e. 28.5 pm he-_ of a photon of light is一一proportional to its fi a. energy, directly, inversely b. energy, inversely, directly c. velocity, directly, inversely d. intensity, inversely, directly e. amplitude, directly, inversely 3. T frequency and proportional to its wavelength. 4. How many orbitals have the following set of quantum numbers n-2,-1, m.-17 5. Which of the following regions of the electromagnetic spectrum has the lowest frequency? a. x-ray b. gamma ray c. ultraviolet d. infrared e. visible 6. Which of the following statements is/are CORRECT? FM radio waves have longer wavelengths than visible radiation and AM radio waves have shorter wavelengths than visible radiation. Magnetic resonance imaging (MRI) uses a mixture of x-rays and gamma rays. Exposure to ultraviolet (UV) radiation can lead to sunburns. 2. 3. c. 3 only d. I and 2 e. 1,2, and 3 a. I only b. 2 only Page 1