Chapters7and8Key - Chemistry 161 Chapters 7 & 8 Study...

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Chemistry 161 Chapters 7 & 8 Study Guide Harold 1. Which radiation has the shortest wavelength? a. Gamma rays b. X-rays c. Blue light d. Red light e. Radio waves 2. Rank the following regions of the electromagnetic spectrum in order of increasing energy. x rays, microwaves, infrared, ultraviolet a. x rays, microwaves, infrared, ultraviolet b. microwaves, ultraviolet, infrared, x rays c. microwaves, infrared, ultraviolet, x rays d. infrared, microwaves, ultraviolet, x rays e. infrared, ultraviolet, x rays, microwaves 3. Calculate the energy (J/particle) of a light of wavelength 45.0 nm. E = h ν ν = c/ λ E = hc/ λ E = 6.63 x 10 -34 x 2.998 x 10 8 /45.0 x 10 -9 = 4.41 x 10 -18 J 4. What is the wavelength of light in cm having a frequency of 1.5 x 10 18 s -1 ? λ = c/ ν λ = 2.998 x 10 8 m/s ÷ 1.5 x 10 18 s -1 = 0.20 nm 5. The first ionization energy of cesium is 6.24 x 10 -19 J/atom. Calculate the minimum frequency of light that is required to ionize a cesium atom. (Planck's constant is 6.63 x 10 -34 J s.) E = h ν ν = E/h = 6.24 x 10 -19 J/6.63 x 10 -34 J s = 9.42 x 10 14 /s (i.e. 318 nm ultraviolet) 6. All of the following statements are correct except : a. The Pauli exclusion principle states that each electron in an atom must have its own unique set of quantum numbers.
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Chapters7and8Key - Chemistry 161 Chapters 7 & 8 Study...

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