Questions from Previous Chemistry 115 Exams Electronic Structure of Atoms

Questions from Previous Chemistry 115 Exams Electronic Structure of Atoms

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Questions from Previous Chemistry 115 Exams Electronic Structure of Atoms 1. 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 2. 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. 3. 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 4. 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
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
5. 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 6. 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 (c) 2 1 +2 (d) 3 3 0 (e) 4 2 -3 7. 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.
Background image of page 2
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. 8. 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 9. 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 10. 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. c. 3.95 x 10 -18 Joules. d. 0.365 x 10 -18 Joules. e. none of these 11. 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. 12. The velocity (s), frequency (f), and wavelength (w) of light are related by: a. s = f/w b. s = fw
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
c. s = f 2 w d. s = w/f e. none of the above 13. 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 14. Which of the following is not a type of electromagnetic radiation? a.
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 16

Questions from Previous Chemistry 115 Exams Electronic Structure of Atoms

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online