Chap 7 questions

Chap 7 questions - How many electrons occupy the 2p...

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How many electrons occupy the 2p orbitals in atoms where 2p orbitals are completely filled? a. 1 b. 2 c. 3 d. 6 e. 10 A Na lamp emits yellow light with a wavelength of 589 nm. What is the energy of a single photon in this light? a. 3.37 x 10 -19 Joules. b. 1.12 x 10 -25 Joules. c. 1.17 x 10 -33 Joules. d. 5.09 x 10 15 Joules. e. 5.09 x 10 14 Joules. Which of the following is a possible electron configuration? a. 1s 2 2s 3 2p 6 b. 1s 2 2s 1 2p 7 c. 1s 2 2s 2 2p 6 3s 2 3p 8 3d 7 d. 1s 2 2s 2 2p 6 3s 2 3d 12 e. 1s 2 2s 2 2p 6 3s 1 3d 9 In all the following pairs, the element and electron configuration are correctly matched EXCEPT for: (a) 1s 2 2s 2 2p 6 3s 2 Mg (b) 1s 2 2s 2 2p 6 3s 2 3p 1 Al (c) 1s 2 2s 2 2p 5 F (d) 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 6 Co (e) 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 2 Ti The energy associated with the transition of an electron from the n=1 state to the n=3 state of H atoms is: a. +1.74 x 10 -17 Joules. b. +1.94 x 10 -18 Joules. c. -1.94 x 10 -18 Joules. d. -1.74 x 10 -17 Joules. e. none of these Which of the following is a permissible set of quantum numbers for an electron in a hydrogen atom? n l m l (a) 1 0 -1 (b) 2 1 +1
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(c) 2 1 +2 (d) 3 3 0 (e) 4 2 -3 The number of distinct emission spectral lines that originate from electron transitions between the first four energy levels in a hydrogen atom is: a. 3. b. 4. c. 6. d. 9. e. 16. The next three questions refer to the photoelectric loss of an electron from metallic Li which requires light of 5.51 x 10 14 s -1 frequency. The energy for loss of an electron from a metallic Li atom is: a. 1.20 x 10 -48 Joules. b. 6.62 x 10 -34 Joules. c. 3.65 x 10 -19 Joules. d. 5.51 x 10 -14 Joules. e. none of these The wavelength (in nm) corresponding to the above frequency is: a. 300 nm b. 333 nm c. 544 nm d. 551 nm e. none of these The maximum kinetic energy (in J) of an electron removed from a Li atom by light of 6.51 x 10 15 s -1 frequency is: a. 4.67 x 10 -18 Joules. b. 4.31 x 10 -18 Joules.
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c. 3.95 x 10 -18 Joules. d. 0.365 x 10 -18 Joules. e. none of these The electron has: a. a negative charge, and much smaller mass than a proton. b. a negative charge, and the same mass as a proton. c. no wavelike properties. d. none of the above. The velocity (s), frequency (f), and wavelength (w) of light are related by: a. s = f/w b. s = fw c. s = f 2 w d. s = w/f e. none of the above Which of the following subatomic particles is responsible for the majority of chemical reactivity of an element or compound? a. proton b. electron c. neutron d. atomic mass number e. photon Which of the following is not a type of electromagnetic radiation? a. red light b. sound waves c. x-rays d. photon e. ultraviolet radiation By use of a suitable filter, the green mercury emission line can be isolated. This line has a wavelength of 546.1 nm. What is the frequency? [1 Hz = 1 s -1 ] a. 5.490 x 10 14 Hz b. 1.820 x 10 4 Hz c. 1.640 x 10 2 Hz d. 5.461 x 10 -7 Hz e. 1.820 x 10 -13 Hz
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