20Ne 19F- 24Mg2+
College Chemistry Multiple Choice Question Set 2
| 1. The probability area that best represents the shape of one of the atomic 3d orbitals is... | ||
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| 2. The common isotopes of carbon are 12C and 13C. The average mass of carbon is 12.01115 amu. What is the abundance of the 13C isotope? | ||
| (a) | 1.115% | |
| (b) | 98.885% | |
| (c) | 0.480% | |
| (d) | 99.52% | |
| 3. If the abundance of 6Li (6.015121 amu) is 7.500% and the abundance of 7Li (7.016003 amu) is 92.500%, what is the average atomic mass? | ||
| (a) | 6.0750 amu | |
| (b) | 6.0902 amu | |
| (c) | 6.9250 amu | |
| (d) | 6.9409 amu | |
4. What do the following
have in common?
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| (a) | They are isotopes of each other. | |
| (b) | They are isomers of each other. | |
| (c) | They are isoelectronic with each other. | |
| (d) | They are different elements so they have nothing in common. | |
| 5. How many valence electrons does an oxygen atom have? | ||
| (a) | 2 | |
| (b) | 6 | |
| (c) | 8 | |
| (d) | 16 | |
| 6. Fluorine atoms tend to...?...when they form chemical compounds with metals. | ||
| (a) | lose electrons | |
| (b) | gain electrons | |
| (c) | neither lose nor gain electrons...they usually share electrons equally with metals. | |
| (d) | Fluorine atoms do not form compounds with other atoms...fluorine is an inert gas. | |
| 7. The identity of an element is determined by... | ||
| (a) | the number of its protons. | |
| (b) | the number of its neutrons. | |
| (c) | the number of its electrons. | |
| (d) | its atomic mass. | |
| 8. The probability area that best represents the shape of an atomic 3p orbital is... | ||
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| 9. Which of the following electron configurations represents the electron configuration for a magnesium cation...Mg2+? | ||
| (a) | 1s22s22p63s2 | |
| (b) | 1s22s22p63s23p2 | |
| (c) | 1s22s22p6 | |
| (d) | 1s22s22p4 | |
| 10. Which of the following orbital box diagrams represents silicon, which has 14 electrons? | ||
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| 11. The half-life of francium-212 is 19 minutes. How many minutes will it take for 1 gram of this isotope to decay to 0.125 grams? | ||
| (a) | 4.75 minutes | |
| (b) | 9.5 minutes | |
| (c) | 38 minutes | |
| (d) | 57 minutes | |
| 12. The atom formed by the beta decay of carbon-14 is... | ||
| (a) | oxygen-18 | |
| (b) | beryllium-10 | |
| (c) | boron-14 | |
| (d) | nitrogen-14 | |
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Copyright © November 2000 by Richard C. Banks...all rights reserved.