CHEMISTRY TEST (A) Name: ____________________
ceo薪酬CHAPTERS 11, 13, & 14 Tuesday, June 6th, 2001
Place the correct letter in the space provided. Please read each question carefully and be sure your answers are legible.
______1. In Bohr’s model of the atom, where are the electrons and protons located?
a) The electrons orbit the protons, 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 following scientists developed the quantum mechanical model
of the atom?
a) Albert Einstein
b) Erwin Schrodinger
c) Niels Bohr
d) Ernest Rutherford
e) Joseph Thomson
______3. The quantum mechanical model of the atom:
a) defines the exact path of an electron around the nucleus
b) is concerned with the probability of finding an electron in a certain position
c) has many analogies in the visible world
d) none of the above
2010年1月3日______4. The shape of an electron cloud is determined by the electron’s
a) energy sub level
b) 对号函数spin
c) position
d) speed
e) principal quantum number
______5. How many f orbitals can there be in one atom?
a) 1 b) 3 c) 5 d) 7 e) 9
______6. What is the maximum number of electrons in a d sub level?
a) 2 b) 4 c) 5 d) 8 e) 10
______7. What is the maximum number of electrons in the second principle energy
level?
a) 2 b) 8 c) 18 d) 32 e) 64
______8. The formula 2n2 represents:
a) the number of orbitals in a sub level
b) the maximum number of electrons that can occupy an energy level
c) the number of sub levels in any energy level
d) none of the above
______9. Which of the following energy levels has the lowest energy?
a) 3d b) 4s c) 4p d) 4f
______10. If the spin of one electron in an orbital is clockwise, what is the spin of the
other electron in that orbital?
a) zero
b) clockwise
c) 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 orbital
b) two electrons in one orbital, one in another, and none in the third
c) three in one orbital, none in the other two
______12. What is the next atomic orbital in the series 1s, 2s, 2p, 3s, 3p?
电离层 a) 2d b) 2f c) 3d d) 3f e) 4s
______13. How many half-filled orbitals are there in a bromine atom?
a) 1 b) 2 c) 3 d) 4 e) 5
______14. In order to occupy the same orbital, two electrons must have:
a) the same direction of spin上海名老中医
诊疗所 b) low energy
c) a high quantum number
d) opposite spin
______15. According to the Aufbau principle,
a) an orbital may be occupied by only two electrons
b) electrons in the same orbital must have opposite spins
c) electrons enter orbitals of highest energy first
d) electrons enter orbitals of lowest energy first
______16. What is the name given to the electrons in the highest occupied energy level
of an atom?
a) affinity electrons
b) orbital electrons
c) valence electrons
d) cations
e) anions
______17. How many valence electrons are there in an atom of phosphorus?
a) 2 b) 3 c) 4 d) 5 e) 6
______18. How many valence electrons do group II elements have?
a) 2 b) 3 c) 4 d) 5 e) 6
______19. How many valence electrons does an atom of any halogen have?
a) 7 b) 4 c) 6 d) 8
______20. In forming chemical bonds, atoms attain:
a) a state of lower energy
b) the electron configuration of noble gas atoms
c) greater stability
d) all of the above
______21. The octet rule states that, in chemical reactions, atoms change their
numbers of electrons in order to:
a) obtain the electron configuration of a noble gas
b) become neutral rather than charged
c) have eight electrons in their principal energy level甘巴豆
d) give off electrons
______22. How does calcium obey 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.
______23. What is the electron configuration of the calcium ion?
a) 1s22s22p63s23p3
b) 1s22s22p63s23p6
c) 1s22s22p63s23p54s1
d) 1s22s22p63s23p64s24p6
e) 1s22s22p63s23p63d10
______24. How does oxygen obey the octet rule when reacting to form compounds?
a) It gains electrons.
b) It loses electrons.
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