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1、CHEMISTRY TEST (A)Name: _CHAPTERS 11, 13, & 14Tuesday, June 6th, 2001Place the correct letter in the space provided. Please read each question carefully and be sure your answers are legible._1. In Bohrs model of the atom, where are the electrons and protons located?a) The electrons orbit the protons
2、, which are in the center of the atom.b) The electrons and protons move throughout the atom.c) The electrons occupy fixed positions around the protons, which are at the center of the atom.d) The electrons and protons are located throughout the atom, but they are not free to move._2. Which of the fol
3、lowing scientists developed the quantum mechanical model of the atom?a) Albert Einsteinb) Erwin Schrodinger c) Niels Bohrd) Ernest Rutherforde) Joseph Thomson_3. The quantum mechanical model of the atom:a) defines the exact path of an electron around the nucleusb) is concerned with the probability o
4、f finding an electron in a certain positionc) has many analogies in the visible worldd) none of the above_4. The shape of an electron cloud is determined by the electronsa) energy sub levelb) spin c) positiond) speede) principal quantum number_5. How many f orbitals can there be in one atom?a) 1b) 3
5、c) 5d) 7e) 9_6. What is the maximum number of electrons in a d sub level?a) 2b) 4c) 5d) 8e) 10_7. What is the maximum number of electrons in the second principle energy level?a) 2b) 8c) 18d) 32e) 64_8. The formula 2n2 represents:a) the number of orbitals in a sub levelb) the maximum number of electr
6、ons that can occupy an energy levelc) the number of sub levels in any energy leveld) none of the above_9. Which of the following energy levels has the lowest energy?a) 3db) 4sc) 4pd) 4f_10. If the spin of one electron in an orbital is clockwise, what is the spin of the other electron in that orbital
7、?a) zerob) clockwisec) counterclockwise_11. If three electrons are available to fill three empty 2p atomic orbitals, how will the electrons be distributed in the three orbitals?a) one electron in each orbitalb) two electrons in one orbital, one in another, and none in the thirdc) three in one orbita
8、l, none in the other two_12. What is the next atomic orbital in the series 1s, 2s, 2p, 3s, 3p?a) 2db) 2fc) 3dd) 3fe) 4s_13. How many half-filled orbitals are there in a bromine atom?a) 1b) 2c) 3d) 4e) 5_14. In order to occupy the same orbital, two electrons must have:a) the same direction of spinb)
9、low energy c) a high quantum numberd) opposite spin_15. According to the Aufbau principle, a) an orbital may be occupied by only two electronsb) electrons in the same orbital must have opposite spinsc) electrons enter orbitals of highest energy firstd) electrons enter orbitals of lowest energy first
10、_16. What is the name given to the electrons in the highest occupied energy level of an atom?a) affinity electronsb) orbital electronsc) valence electronsd) cations e) anions_17. How many valence electrons are there in an atom of phosphorus?a) 2b) 3c) 4d) 5e) 6_18. How many valence electrons do grou
11、p II elements have?a) 2b) 3c) 4d) 5e) 6_19. How many valence electrons does an atom of any halogen have?a) 7b) 4c) 6d) 8_20. In forming chemical bonds, atoms attain:a) a state of lower energyb) the electron configuration of noble gas atomsc) greater stabilityd) all of the above_21. The octet rule st
12、ates that, in chemical reactions, atoms change their numbers of electrons in order to:a) obtain the electron configuration of a noble gasb) become neutral rather than chargedc) have eight electrons in their principal energy leveld) give off electrons_22. How does calcium obey the octet rule when rea
13、cting to form compounds?a) It gains electrons.b) It loses electrons.c) It does not change its number of electrons._23. What is the electron configuration of the calcium ion?a) 1s22s22p63s23p3b) 1s22s22p63s23p6c) 1s22s22p63s23p54s1d) 1s22s22p63s23p64s24p6e) 1s22s22p63s23p63d10_24. How does oxygen obe
14、y the octet rule when reacting to form compounds?a) It gains electrons.b) It loses electrons.c) It does not change its number of electrons._25. Which kind of ion does sulfur become when it combines with a metal?a) anionb) cationc) it does not become an ion._26. What is the electron configuration of the iodide ion (I-)?a) 1s22s22p63s23p63d104s24p64d105s25p6b) 1s22s22p63s23p63d104s24p64d10c) 1s22s22p63s2
