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# quantumtrendsbondingap - Name Period Properties of Light...

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Name: _____________________ Period: ___ Properties of Light and Quantum Mechanics (1) Microwave radiation has a wavelength of 1.0 cm. Determine the frequency and energy of this form of radiation. (2) The first radio station in Los Angeles broadcasted with a frequency of 930 kHz. Determine the wavelength and energy of this form of radiation. (3) Blue light emits photons with an energy of 4.41x10 -19 J. Determine the frequency and wavelength of this light. (4) It requires 7.29x10 -19 J of light energy to remove an electron from the surface of tungsten metal. Determine the frequency and wavelength of photons with this energy. (5) Calculate the energy of an electron in the first energy level of a hydrogen atom. Calculate the energy of an electron in the second energy level of a hydrogen atom. How much energy is given off by an electronic transition from the second level to the first energy level? What is the wavelength and frequency associated with this energy? (6) Calculate the energy of an electron in the third energy level of a hydrogen atom. Calculate the energy of an electron in the fifth energy level of a hydrogen atom. How much energy is given off by an electronic transition from the fifth level to the third energy level? What is the wavelength and frequency associated with this energy? (7) Label the orbital described by each set of quantum numbers. (a) n = 3 and l = 1 (c) n = 5 and l = 3 (b) n = 2 and l = 0 (d) n = 4 and l = 2 (8) Which sets of quantum numbers are not allowed in a hydrogen atom? For the sets of quantum numbers that are incorrect, state what is wrong. (a) n = 2, l = 2, m l = 1, m s = ½ (c) n = 5, l = 1, m l = 2, m s = -½ (b) n = 3, l = 1, m l = 0, m s = -½ (d) n = 2, l = 0, m l = 0, m s = ½ (9) How many orbitals can have each designation? (a) 2p (b) 3d (c) 4p x (d) n = 3 (e) n = 4 (10) How many electrons can have each designation? (a) 1s (b) 2p (c) 3p y (d) 2d xy (e) 5f (11) What is the maximum number of electrons in an atom that can have the given quantum numbers? (a) n = 4 (c) n = 3 and m l = 0 (b) n = 5 and l = 2 (d) n = 3 and m s = ½ (12) Give the orbital notation for each atom/ion. (a) Ge (b) Cs (c) Zr (d) Cl - (e) Sr 2+ (f) Zn 2+ (13) Give the electron configuration notation for each atom/ion. (a) K (b) Ni (c) Pu (d) Mg 2+ (e) Br - (f) Ag + (14) Give the noble gas notation for each atom/ion. (a) Si (b) Y (c) Ba (d) Ca 2+ (e) Au 3+ (f) Mo 2+ (15) Give the ground state and two possible excited states for oxygen. (16) An excited state for different atoms is given. Identify the element and give the ground state configuration. (a) 1s 2 2s 2 2p 5 3s 1 (b) 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 5 4p 1 (c) [Kr] 5s 2 4d 7 5p 2 6s 1

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Answers: (1) ν = 3.0x10 10 Hz, E = 2.0x10 -23 J (2) λ = 323 m, E = 6.2x10 -28 J (3) ν =6.66 x10 14 Hz , λ = 4.51x10 -7 m (4) ν = 1.10x10 15 Hz, λ = 2.73x10 -7 m (5) E 2 = -5.445x10 -19 J, E 2 = -2.178x10 -18 J, E 2-1 = 1.6345x10 -18 J, ν = 2.465x10 15 Hz, λ = 1.22x10 -7 m (6) E 5 = -8.712x10 -20 J, E 3 = -2.420x10
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quantumtrendsbondingap - Name Period Properties of Light...

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